Complete IAQ Engineering

Complete Fresh Air,
Ventilation & IAQ Systems

InAir offers a complete range of fresh air ventilation systems, energy recovery ventilators, heat pump air handling units, IAQ sensors, inline fans, exhaust fans, centrifugal fans, jet fans, filtration systems, ducting, dampers, and accessories.

From compact residential apartments to premium villas, schools, hospitals, offices, hotels, basements, commercial buildings, and industrial facilities — every InAir product is selected based on airflow requirement, application, and air quality outcome.

The InAir product range: energy recovery ventilators, air handling units, inline, exhaust and centrifugal fans, and filter boxes
Revita
Residential Workhorse
Compact ERV · 150–500 m³/h · Apartments & villas · 220V · 24/7 silent operation
Revita Series →
Ventura
Commercial Workhorse
Large ERV · 800–7500 m³/h · Schools, offices, commercial buildings · Single & 3-phase
Ventura Series →
RHP
Active Cooling ERV
Heat Pump ERV · R410A cooling coil · 22–28°C · 600–8000 m³/h · Ceiling & floor
RHP Series →
Fresh Air · Filtration · Exhaust · Air Movement · Intelligence. One complete IAQ ecosystem.
Request product selection → Download catalogue Share floor plan
All Products Revita & Ventura ERV RHP Heat Pump ERV IAQ Sensors Standalone Units Inline & Duct Fans Toilet Exhaust EC Inline Fans Mixed Flow Fans Cabinet Fans Industrial Fans Jet Fans Filtration Ducts & Dampers Accessories Fresh Air Dehumidifier Kitchen Exhaust
Revita & Ventura — Fresh Air ERV Systems
Revita (residential workhorse) and Ventura (commercial workhorse) — continuous filtered fresh air with 80–90% heat recovery.
Revita (residential) · Ventura (commercial) · 15 models →
Heat Pump ERV AHUs
RHP — heat recovery + R410A cooling coil + dehumidification + active temperature control (22–28°C). Ceiling & floor.
12 models · 600–8000 m³/h →
IAQ Sensors & Controls
PM2.5, CO₂, VOC, temp, humidity. WiFi. Android & iOS. BMS-ready. Demand-controlled ventilation.
2 models · Sensor + Thermostat →
Standalone Units
Compact units for finished homes, single rooms and retrofit projects where full ducting isn't feasible.
Residential · Retrofit →
Inline & Duct Fans
Compact quiet duct-mounted fans for supply, exhaust, booster airflow and ducted ventilation.
120–920 m³/h · 21–45 dB →
Toilet Exhaust Fans
Silent exhaust for odour control, humidity removal and negative-pressure toilet ventilation.
Residential · Commercial →
EC Inline Duct Fans
PWM speed control, low noise EC motors. BMS-compatible. Demand-controlled ventilation.
10-speed · EC motor →
Mixed Flow & Duct Fans
Practical air movement for ducted supply, exhaust and booster applications in compact spaces.
Direct duct · Circular →
Cabinet Centrifugal Fans
High-volume low-noise forward centrifugal fans for commercial and large-building ventilation.
1700–120,000 m³/h →
Industrial Centrifugal Fans
INA73 high-static-pressure fans for factories, plants, air treatment and industrial exhaust.
Type A · C · D drive →
Jet Fans
High-thrust ductless ventilation for basements, tunnels, car parks. One-way and reversible models.
IP55 · Class H · Reversible →
Filtration Systems
HEPA H13, activated carbon and pre-filter boxes. Multi-stage. 120–2600 m³/h. 98% PM2.5 capture.
HEPA H13 · Carbon →
Ducts & Dampers
Flat ducts, circular ducts, dampers, motorised valves, actuators and airflow control components.
Flat · Round · Flexible →
Air Distribution Accessories
Diffusers, grilles, cowls, hoods, lintels, valves and distribution boxes for complete ventilation.
Diffusers · Cowls · Grilles →
Fresh Air Dehumidifier — Rotary
G4 + H10 filtration, total heat recovery wheel, EC fan, compressor-based dehumidification. Wall mounted.
INAV-HTRW30 · 300 CMH →
Fresh Air Dehumidifier — Water Coil
Plate heat exchange + water cooling coil dehumidification. G4 + H10 filtration. 300–500 CMH. Left/right config.
INAD-CW30 / CW50 →
Kitchen & Commercial Exhaust
High-capacity kitchen extraction for heat, smoke, grease, odours in restaurants and hospitality.
Restaurants · Hotels →
Not sure which product fits your project?

Share your floor plan, occupancy, application, and air quality target. Our design team will recommend the right product combination — at no charge.

On this page — 17 product families

← Back to all products
Fresh Air & Energy Recovery

InAir Revita & Ventura
Energy Recovery Ventilation Units

Revita (compact residential) and Ventura (large commercial) — InAir's ERV workhorses — continuously bring filtered outdoor air into indoor spaces while exhausting stale indoor air, recovering 80–90% of the thermal energy in the outgoing air stream. The result is continuously fresh, filtered, energy-efficient indoor air without burdening your AC system. The Revita handles every home project from 1 BHK to large villas; the Ventura handles offices, schools, and commercial buildings at scale.

Suitable for residences, villas, offices, schools, clinics, commercial spaces, hospitality projects, and institutional campuses.

Filtered fresh air with energy recovery for healthier, more efficient indoor spaces.
Download specification sheet →
InAir Revita and Ventura Energy Recovery Ventilation Units
Key Features
✓High-efficiency plate-type heat exchanger — 80–90% thermal energy recovery
✓Pre-filter for primary dust filtration + MERV-13 / HEPA-13 fine particle filtration (grade by location)
✓Continuous fresh air supply — reduces CO₂, allergens, humidity and VOCs
✓Single-phase 220V (compact models) to three-phase 440V (large commercial)
✓Durable PUFF panel body with aluminium base frame on large FS models
✓Compatible with IAQ sensors and BMS integration for demand-controlled ventilation
Technical Specifications — Complete Model Range
Revita — INA-MFQR series · Compact residential · 150–500 m³/h
Ventura — INA-QRXF series · Large commercial · 800–7500 m³/h
ModelAirflowHeat ExchangerFiltrationPower SupplyConstructionIdeal For
Revita INA-MFQR-150150 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandard compact1 BHK · Studio
Revita INA-MFQR-250250 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandard compact2 BHK Apartment
Revita INA-MFQR-350350 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandard compact3 BHK Apartment
Revita INA-MFQR-500500 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandard compact4 BHK / Villa
Ventura INA-QRXF-800800 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandardLarge Villa / Office
Ventura INA-QRXF-10001,000 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandardOffice / School Zone
Ventura INA-QRXF-13001,300 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandardLarge Office / School
Ventura INA-QRXF-15001,500 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhStandardCommercial Building
Ventura INA-QRXF-2000-FS2,000 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhPUFF panel + Al frameLarge Bungalow / School Block
Ventura INA-QRXF-2500-FS2,500 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)220V / 50Hz / 1-PhPUFF panel + Al frameCommercial / Institutional
Ventura INA-QRXF-3000-FS3,000 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)440V / 50Hz / 3-PhPUFF panel + Al frameInstitutional Building
Ventura INA-QRXF-4000-FS4,000 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)440V / 50Hz / 3-PhPUFF panel + Al frameLarge Commercial
Ventura INA-QRXF-5000-FS5,000 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)440V / 50Hz / 3-PhPUFF panel + Al frameHospital / Campus Block
Ventura INA-QRXF-6000-FS6,000 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)440V / 50Hz / 3-PhPUFF panel + Al frameLarge Campus
Ventura INA-QRXF-7500-FS7,500 m³/hPlate-type (80–90%)MERV-13 / HEPA-13 (grade by city)440V / 50Hz / 3-PhPUFF panel + Al frameIndustrial / Campus
Best Applications
Villas & Premium Apartments Offices & Co-working Schools & Classrooms Clinics & Healthcare Hospitality & Restaurants Urban High-AQI Environments High-Occupancy Rooms
Not sure whether MERV-13 or HEPA-13 is right for your city?

Filter requirements differ by location. Delhi winters need HEPA-13. Hyderabad and Bangalore may need different grades. Coastal cities have humidity considerations. Tell us your city — our engineer will recommend the right filter grade.

Frequently Asked Questions — Fresh Air & ERV Systems
For a standard 3 BHK (1400–1600 sq ft, 4 occupants), the INA-MFQR-350 at 350 m³/h meets ASHRAE 62.1 fresh air requirements. For a larger 3 BHK (1800+ sq ft or 5 occupants), the INA-MFQR-500 at 500 m³/h is recommended. Our engineers calculate exact airflow requirements based on your specific floor plan and occupancy during the free site survey.
The plate heat exchanger recovers 80–90% of the thermal energy from outgoing stale air and transfers it to incoming fresh outdoor air — before filtration. This means fresh air arrives very close to room temperature. Your AC does not need to cool raw 40°C outdoor air from scratch. Net electricity impact: near-zero. In our Mumbai case study, this contributed to a 1.2–1.9 year system payback period.
MERV-13 / HEPA-13 (Minimum Efficiency Reporting Value 13) is the filter grade used in hospitals — it captures 99%+ of PM2.5, pollen, mould spores, dust mites, and most airborne bacteria. A standard residential filter (MERV-5 to MERV-8) captures only larger particles above 10 microns. On high-AQI days in Delhi or Hyderabad, only MERV-13 / HEPA-13 filtration provides meaningful PM2.5 protection. All InAir ERV units include MERV-13 / HEPA-13 (HEPA-13 optional) as standard — not an upgrade.
Yes — renovation is the second-best time to install (construction is ideal). During renovation when false ceilings are open and walls are accessible, ducting can be routed cleanly before finishing. This is significantly easier and cheaper than post-renovation installation. If you are planning a kitchen renovation, bathroom upgrade, or repainting, contact InAir during that phase for the cleanest installation outcome.
← Back to all products
Heat Pump Energy Recovery

InAir RHP — Heat Pump Energy
Recovery Air Handling Units

InAir RHP units combine fresh air treatment, heat recovery, active cooling, heating, dehumidification, and MERV-13 / HEPA-13 filtration into one integrated air handling platform — built around an R410A refrigerant cooling coil that actively conditions incoming air to a precise 22–28°C. These units are ideal for projects where fresh air needs to be delivered at controlled temperature and humidity — regardless of outdoor conditions.

InAir InAir RHP — Heat Pump Energy Recovery Air Handling Units

The direct expansion heat recovery system works with the plate-type heat exchanger to maximise energy recovery from exhaust air, improve system efficiency, and deliver treated fresh air with active cooling and heating capability.

Fresh air treatment made healthier and more energy-efficient.
✓Direct expansion heat recovery + plate-type heat exchanger
✓Integrated cooling and heating (R410A refrigerant)
✓Pre-filter and MERV-13 / HEPA-13 fine particle filtration (grade by location) included
✓Precise temperature control: 22°C – 28°C
✓Active dehumidification — handles Indian monsoon humidity loads
✓Ceiling-mounted and floor-standing models for different site conditions
✓380V / 3PH / 50Hz — three-phase power supply
✓Pairs with INA-THE-SENSOR for thermostat control and IAQ monitoring
Ceiling-Mounted Models — INA-RHP-B1-C Series
ModelAirflowCoolingHeatingRefrigerantPower
RHP INA-RHP-006B1-C600 m³/h5.2 kW5.4 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-010B1-C1,000 m³/h8.3 kW9.1 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-020B1-C2,000 m³/h17.3 kW17.9 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-030B1-C3,000 m³/h25.6 kW26.8 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-040B1-C4,000 m³/h36.5 kW37.8 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-050B1-C5,000 m³/h44.5 kW46.0 kWR410A380V / 3PH / 50Hz
Floor-Standing Models — INA-RHP-A1-FS Series
ModelAirflowCoolingHeatingRefrigerantPower
RHP INA-RHP-030A1-FS3,000 m³/h25.6 kW26.8 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-040A1-FS4,000 m³/h36.5 kW37.8 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-050A1-FS5,000 m³/h44.5 kW46.0 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-060A1-FS6,000 m³/h54.8 kW56.5 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-070A1-FS7,000 m³/h65.0 kW67.5 kWR410A380V / 3PH / 50Hz
RHP INA-RHP-080A1-FS8,000 m³/h73.0 kW76.5 kWR410A380V / 3PH / 50Hz
Download specification sheet Request Heat Pump ERV design support
Premium Villas Schools & Campuses Office Buildings Healthcare Spaces Hospitality Projects
Frequently Asked Questions — Heat Pump ERV AHUs
An ERV uses a passive plate heat exchanger to recover 80–90% of thermal energy from outgoing stale air — it does not actively cool or heat incoming air. A Heat Pump ERV (RHP series) adds an active R410A refrigerant circuit that actively cools and dehumidifies incoming air to a precise 22–28°C setpoint. This eliminates the latent load (humidity) that forces your AC to work harder. Recommended for Mumbai, Chennai, and other high-humidity coastal Indian cities.
No — the Heat Pump ERV treats only the fresh air stream (the outdoor air being brought in). Your existing AC continues to cool the room air. However, because the RHP pre-conditions fresh air to 22–28°C before it enters the room, your AC load is significantly reduced — particularly the latent (humidity) load, which is the most energy-intensive part of cooling in Indian monsoon conditions. Many projects see 20–40% AC load reduction after Heat Pump ERV installation.
Yes — all InAir Heat Pump ERV units (both ceiling-mounted B1-C series and floor-standing A1-FS series) require 380V / 3-phase / 50Hz power supply. This is standard for premium villas, commercial buildings, schools, hotels, and institutional campuses. Single-phase ERV units (INA-MFQR and INA-QRXF series) are available for smaller residential applications that do not need active cooling and dehumidification.
← Back to all products
Smart IAQ Monitoring

IAQ Sensors &
Smart Ventilation Controls

Traditional ventilation systems work on assumptions. InAir smart IAQ systems work on real-time data. By monitoring air quality parameters continuously, the ventilation system can respond to occupancy, pollutant load, humidity, and CO₂ levels — delivering fresh air when and where it is needed, and reducing energy when it is not.

InAir IAQ Sensors & Smart Ventilation Controls
INA-SENSOR
InAir IAQ Sensor
Technical Specifications
PM2.5 MonitoringReal-time · laser particle counting
TemperatureReal-time monitoring
HumidityReal-time monitoring
VOC SensingStandard VOC sensor
ConnectivityStandard WiFi
App SupportAndroid & iOS
Download specification sheet
INA-THE-SENSOR
Thermostat Controller + IAQ Sensor
Technical Specifications
Temperature Control22°C – 28°C precise regulation
PM2.5 MonitoringReal-time
Temperature & HumidityReal-time monitoring
VOC SensingStandard VOC sensor
ConnectivityStandard WiFi
Required ForAll Heat Pump ERV units
Download specification sheet

InAir IAQ sensors can be integrated with motorised dampers and BMS systems to enable classroom-level, room-level, or zone-level demand-controlled ventilation — as demonstrated in the Bloomingdale International School deployment.

Schools Offices Premium Homes Healthcare Smart Buildings BMS-Integrated Projects
Frequently Asked Questions — IAQ Sensors & Controls
Demand-controlled ventilation (DCV) adjusts fresh air supply in real time based on actual occupancy and pollutant load — rather than running at a fixed speed. When CO₂ rises above a threshold (indicating room is occupied), the ERV increases airflow. When VOC spikes (from cleaning or cooking), the system ramps up to flush the space. When rooms are empty, airflow reduces to save energy. InAir's INA-SENSOR and INA-THE-SENSOR measure all relevant parameters and interface with the ERV unit and motorised dampers.
The INA-THE-SENSOR (thermostat controller + sensor) is required for all InAir Heat Pump ERV (RHP series) units. It provides thermostat control within 22°C–28°C, plus real-time monitoring of PM2.5, temperature, humidity, and VOC. The standard INA-SENSOR (without thermostat function) is suitable for standard ERV units.
← Back to all products
Retrofit & Finished Homes

Standalone Fresh Air
Ventilation Units

Standalone InAir units are designed for spaces where full ducted ventilation may not be practical — finished homes, single-room applications, retrofit projects, and spaces where running ducting through a false ceiling is not feasible. They provide targeted fresh air ventilation with minimal installation complexity.

InAir Standalone Fresh Air Ventilation Units
Already done up your interiors? We still have a solution.

Inair works best during construction — but standalone and compact wall-mount units are available for finished homes. Our engineers will advise the most practical option for your specific space during a free site survey.

Talk to an engineer about your finished home
✓Compact installation — minimal civil disruption
✓Suitable for retrofit applications in finished spaces
✓Wall-mount options for individual room ventilation
✓Fresh air for targeted rooms without full-building ducting
✓Lower installation complexity than central ducted systems
✓Ideal for bedrooms, study rooms, and clinics requiring targeted IAQ improvement
Download specification sheet Book free site survey
Finished Homes Single Rooms Bedrooms Study Rooms Clinics Retrofit Projects
← Back to all products
Inline, Duct & Silent Fans

Inline, Duct &
Silent Ventilation Fans

InAir inline and duct fans are compact, efficient air movement solutions for ducted ventilation, exhaust, air transfer, booster airflow, and silent indoor ventilation. The range includes purified duct fans, two-way ventilation duct fans, and inline air conditioner fans — each suited to specific duct layouts, airflow requirements, and installation conditions.

InAir Inline, Duct & Silent Ventilation Fans
✓Compact duct-mounted design — fits inside standard duct routes and ceiling voids
✓Low-noise operation — suitable for occupied bedrooms, offices and schools
✓Supply and exhaust configurations available
✓Multiple airflow capacities: 120 m³/h to 920 m³/h
✓Energy-saving motor options for reduced operating cost
✓Filter system option on purified duct fan models
✓Noise ratings from 21 dB(A) to 45 dB(A) depending on model and speed
✓Forward-inclined double suction impellers on inline AC fan models for high volume and low noise

Model airflows: 120–920 m³/h. Noise: 21–45 dB. Static pressure up to 382 Pa. Contact us for model-specific technical datasheets and selection support.

Download specification sheet Request selection support
HomesOfficesRestaurantsKitchensSchoolsWarehousesDucted Ventilation Systems
← Back to all products
Toilet Exhaust & Odour Control

Toilet Exhaust &
Odour Control Fans

InAir toilet exhaust systems are designed to remove odours, humidity, stale air, and pollutants from toilets, restrooms, cloakrooms, washrooms, service areas, and utility zones. The range covers compact residential exhaust fans to large ducted commercial exhaust systems — including silent, ultra-thin, EC smart, and high-capacity options.

InAir Toilet Exhaust & Odour Control Fans
✓Maintains negative pressure in toilet zones — prevents odour migration
✓Removes odours, humidity and stale air at source
✓Compact and ultra-thin silent options for residential spaces
✓EC smart controller options for demand-based operation
✓Suitable for both ducted and direct exhaust layouts
✓Compatible with individual toilets and common toilet block systems
✓Options for homes, offices, malls, schools, hotels, and commercial restrooms
✓Can be integrated into larger building exhaust systems

Range includes mixed flow fans, direct duct fans, ultra-thin silent fans, EC inline duct fans with smart digital controllers, and kitchen/utility exhaust fans. Request datasheet for specific model specifications.

Download specification sheet Request selection support
Homes & ApartmentsOfficesHotels & MallsSchoolsRestaurantsCommercial ToiletsPublic Restrooms
← Back to all products
EC Inline Duct Fans

EC Inline Duct Fans

InAir EC Inline Duct Fans are designed for energy-efficient, low-noise, speed-controlled ventilation. EC (Electronically Commutated) motors provide superior controllability, longer service life, higher efficiency, quieter performance, and lower vibration compared to conventional AC motor fan systems — making them ideal for smart, BMS-integrated, and demand-controlled ventilation applications.

InAir EC Inline Duct Fans
✓Electronically commutated (EC) motor — higher efficiency than AC motors
✓PWM-based motor control — precise speed adjustment
✓Mixed flow design — high airflow at moderate static pressure
✓Dust and liquid ingress protection for reliability
✓Precise speed controller — 10-speed control option
✓Temperature and humidity monitoring sensor option
✓Low-noise performance — suitable for bedrooms, offices, classrooms
✓BMS-compatible — integrates with building automation systems

EC fan performance data and model specifications available on request. PWM control compatibility, BMS integration, speed range, and noise levels vary by model. Contact our team for selection support.

Download specification sheet Request selection support
Smart HomesOfficesSchoolsMeeting RoomsBMS ProjectsDemand-Controlled VentilationLow-Noise Ducted Systems
← Back to all products
Mixed Flow, Direct Duct & Circular

Mixed Flow, Direct Duct
& Circular Duct Fans

InAir offers multiple compact fan formats for different duct layouts, airflow requirements, and installation conditions. Mixed flow fans deliver strong airflow in ducted systems, direct duct fans are suited for short straight runs and direct wall exhaust, and circular duct fans integrate into round duct systems for kitchens, bathrooms, and utility spaces.

InAir Mixed Flow, Direct Duct & Circular Duct Fans
✓Multiple formats: mixed flow, direct duct, circular duct
✓Suitable for supply air, exhaust air, and booster airflow applications
✓Compact design — fits inside standard duct dimensions
✓Suitable for kitchens, toilets, service rooms, small offices
✓Direct duct versions for short-run direct exhaust
✓Circular duct fans for round duct integration
✓Low-noise options available
✓Easy installation and maintenance access

Airflow and pressure specifications vary by sub-type and model. Request full technical datasheet including mixed flow, direct duct, and circular duct model ranges.

Download specification sheet Request selection support
ToiletsKitchensService RoomsSmall OfficesUtility AreasDucted ExhaustCompact Commercial Spaces
← Back to all products
Cabinet Type Centrifugal Fans

Cabinet Type Forward
Centrifugal Fans

InAir Cabinet Type Forward Centrifugal Fans are designed for high-volume, low-noise commercial and industrial ventilation. The INA series forward-curved multi-blade design delivers high airflow at low noise levels, making these fans suitable for office buildings, hotels, theatres, auditoriums, basements, shopping malls, hospitals, and factories.

InAir Cabinet Type Forward Centrifugal Fans
✓Forward-curved multi-blade centrifugal fan — high airflow, lower noise than backward-curved
✓High airflow and high pressure — 1,700 to 120,000 m³/h across 13 models
✓Low-noise double-wall cabinet design with acoustic insulation
✓Belt drive transmission with European-style pulley for adjustable speed
✓Insert bearing with housing — robust and easy to maintain
✓Galvanised sheet construction — corrosion resistant
✓Detachable access panels for easy maintenance
✓Multiple airflow direction options — flexible site adaptation

INA series: 13 models (250–1000), airflows 1,700–120,000 m³/h, total pressure up to 1,300 Pa. Belt drive, A/C/D transmission options. Request full technical datasheet and selection support for your project.

Download specification sheet Request selection support
Office BuildingsHotels & TheatresBasementsShopping MallsHospitalsFactoriesAuditoriumsHVAC Air Movement
← Back to all products
INA73 Industrial Centrifugal Fans

INA73 Industrial Radial
Centrifugal Fans

The InAir INA73 Industrial Radial Centrifugal Fan series is engineered for industrial air movement, air treatment, atmospheric control, environmental purification, and high-static-pressure ventilation applications. Available in Type A, C, and D transmission configurations with custom outlet angle and rotation direction options.

InAir INA73 Industrial Radial Centrifugal Fans
✓High-efficiency backward-inclined centrifugal impeller for high static pressure
✓Type A: Direct coupling — compact structure and easy maintenance
✓Type C: Belt transmission — adjustable performance by changing pulley ratio
✓Type D: Coupling transmission — simplified compact drive arrangement
✓Custom rotation direction and outlet angle to suit site conditions
✓Carbon steel coated construction for industrial durability
✓Optional accessories: dampers, control cabinets, vibration instruments
✓Optional silencers, soft connections, actuators, and expansion joints

INA73 industrial fan range — specifications include multiple transmission types (A, C, D), custom outlet angles, and rotation direction options. Full technical datasheet, dimensional drawings, and selection support available on request.

Download specification sheet Request selection support
FactoriesPower PlantsIndustrial ExhaustAir TreatmentEnvironmental PurificationLarge Civil BuildingsHigh-Static Duct Systems
← Back to all products
Jet Fans — Basement & Tunnel

Jet Fans for Basements,
Tunnels & Parking Ventilation

InAir Jet Fans are designed for thrust-based ventilation in basements, car parks, tunnels, and large enclosed spaces where ductless air movement, pollutant dilution, and smoke movement support are required. One-way and reversible models are available — reversible models switch between forward and reverse operation within 30 seconds.

InAir Jet Fans for Basements, Tunnels & Parking Ventilation
✓One-way and INA(R) reversible jet fan options
✓Reversible models: switches to rated speed forward or reverse within 30 seconds
✓Aviation aluminium alloy impeller — lightweight, high strength
✓Fully enclosed squirrel-cage motor — protected from environmental ingress
✓Motor insulation Class H — suitable for elevated temperature environments
✓IP55 anti-corrosion protection rating
✓Blade number and blade angle selection for performance optimisation
✓Optional muffler for applications requiring high noise reduction

Jet fan models from 6.3 to 12.5 — dimensional data, blade layout, thrust output, and mounting specifications available in full technical datasheet. Reversible models confirmed to rated speed within 30 seconds. Contact us for basement ventilation design support.

Download specification sheet Request selection support
Basement ParkingCommercial Car ParksTunnelsInfrastructure ProjectsEnclosed Car ParksLarge Ductless Ventilation Zones
← Back to all products
HEPA & Carbon Filtration

HEPA, Activated Carbon
& Filter Boxes

InAir filter boxes improve the quality of incoming or circulated air by combining pre-filtration, HEPA H13 filtration, and activated carbon filtration. Three-stage multi-layer filtration removes particles above 5 microns, fine PM2.5 and smoke, and gaseous pollutants including formaldehyde, odours, and VOCs. Filter boxes can be added to fresh air systems, ducted ventilation layouts, or standalone applications.

InAir HEPA, Activated Carbon & Filter Boxes
✓Pre-filter: removes particles above 5 microns — dust, pollen, hair
✓HEPA H13 filter: high-density filtration — 98%+ PM2.5 capture rate
✓Activated carbon filter: granular carbon removes odours, formaldehyde, VOCs
✓INAGLX-100: Φ100mm duct · 120–320 m³/h · 300×200×200mm casing
✓INAGLX-150: Φ150mm duct · 220–550 m³/h · 300×200×200mm casing
✓INAGLX-200: Φ200mm duct · 520–1500 m³/h · 430×300×300mm casing
✓INAGLX-250: Φ240mm duct · 1200–2600 m³/h · 430×300×300mm casing
✓Airflow reduction: 15–25% — factor into system design

Filter box range: INAGLX-100, INAGLX-150, INAGLX-200, INAGLX-250. HEPA H13 grade across all models. Airflow range: 120–2600 m³/h. Duct sizes Φ100–Φ240mm. 15–25% airflow reduction to be factored in design.

Download specification sheet Request selection support
Delhi / NCR AQI-SensitiveSchoolsPremium HomesClinics & WellnessOfficesUrban EnvironmentsFresh Air ERV Add-On
← Back to all products
Ducts, Dampers & Airflow Control

Ducting, Dampers
& Airflow Control

Correct air distribution is as important as the ventilation machine itself. InAir offers a complete range of flat ducts, circular ducts, flexible ducts, dampers, non-return valves, motorised actuators, and airflow control components to ensure balanced, efficient, and correctly pressured air distribution through your ventilation system.

InAir Ducting, Dampers & Airflow Control
✓Flat duct system (132×30mm ABS) — concealed inside false ceilings and skirting
✓90° and 45° horizontal and vertical bends for routing around obstructions
✓Flat duct connectors and clips for airtight, secure duct joins
✓10-way and 12-way air distribution boxes (INAQY10A / INAQY12A) — Φ100/150mm
✓Round connections Φ100–Φ150mm and rectangular-to-round adapters
✓Control valves INAK278–282 (Φ75–Φ200mm) for airflow balancing
✓Non-return check valves INAK283–286 — prevents backflow when system is off
✓PVC aluminium foil flexible ducts L322–L331 (Φ80–Φ315mm, 8m rolls) — waterproof

Flat duct system: 132×30mm ABS. Distribution boxes: 10-way and 12-way. Round duct connections: Φ75–Φ200mm. Flexible ducts: Φ80–Φ315mm. Control valves and check valves across Φ75–Φ200mm. Full accessories catalogue available to download.

Download specification sheet Request selection support
HomesVillasSchoolsOfficesHospitalsFresh Air SystemsExhaust SystemsBMS Projects
← Back to all products
Air Distribution Accessories

Air Distribution
Accessories

InAir air distribution accessories complete the ventilation system by delivering air quietly, evenly, and aesthetically into occupied spaces. The range includes ceiling vent diffusers, external wall air vents, stainless steel sleek panels, air vent cowls, lintels, and connection boxes — engineered to deliver conditioned air without draught, noise, or visible ductwork.

InAir Air Distribution Accessories
✓Ceiling vent diffusers INAF69–INAF138 — Φ75 to Φ200mm — flush-ceiling supply
✓Stainless steel sleek panels — wire drawing and bronze finishes — aluminium alloy options
✓External wall air vents K304 (Φ110mm) and K305 (Φ160mm) — weather-resistant
✓Air vent cowls INAB164–173 — round stainless steel Φ70 to Φ300mm
✓Hooded cowls INAB206–209 — 8″ to 14″ for commercial/industrial exhaust terminations
✓Lintel fittings INAK293–296 — Φ75 to Φ200mm — sealed wall penetration fittings
✓Y-type and equal T-piece flat tee connectors for duct branching
✓Three-in-one round connection INAD266 — Φ100×120×150mm universal adapter

Full accessories catalogue with part numbers, dimensions, and installation specifications available for download. Diffusers available in multiple designs for different ceiling types and aesthetic requirements.

Download specification sheet Request selection support
BedroomsLiving RoomsClassroomsOfficesCommercial SpacesRestaurantsFresh Air Networks
← Back to all products
Fresh Air · Dehumidification · Rotary Core

Fresh Air Dehumidifier
with Rotary Heat Recovery

The InAir Fresh Air Dehumidifier with Rotary Heat Recovery brings fresh outdoor air indoors while reducing humidity and recovering energy from exhaust air. It filters outdoor air through G4 and H10 filters, exchanges sensible and latent heat through a total heat recovery wheel, dehumidifies through an evaporator and reheats air through a condenser before supply.

Model: INAV-HTRW30 · Airflow: 300 CMH
InAir Fresh Air Dehumidifier with Rotary Heat Recovery
✓Fresh air dehumidification
✓Total heat recovery wheel
✓Sensible heat efficiency above 70%
✓G4 primary filter and H10 high-efficiency filter
✓EC fan with six adjustable speeds
✓Compressor-based dehumidification
✓Evaporator and condenser arrangement
✓Internal rubber board insulation
✓Wall-mounted installation only
✓Optional pressure difference gauge or filter replacement alarm
Not sure which filtration grade suits your city?

Filter grade depends on local AQI and application. Ask our engineer — tell us your city and building type.

Best Applications
Premium homesVillasWellness spacesHigh-humidity apartmentsCoastal citiesMonsoon-sensitive areasClinicsSmall commercial rooms
How to Select — Step by Step
Confirm humidity and fresh air need
Use this unit where both fresh air and dehumidification are required.
Check installation wall
Confirm wall mounting, duct access and service clearance.
Plan air routes
Coordinate outdoor air, exhaust air, return air and supply air paths.
Plan drainage
Provide condensate drain route.
Select alarm options
Consider pressure differential or filter replacement alarms.
Frequently Asked Questions
The rotary wheel transfers both sensible heat and moisture between the outgoing and incoming air streams, so outdoor air arrives closer to room temperature and humidity before any active cooling runs. That matters most in coastal cities such as Chennai, Kochi and Mumbai, where latent load rather than temperature is the dominant cost. Recovering moisture as well as heat is what separates a total-recovery wheel from a plain heat exchanger.
Yes. Outdoor air passes a G4 pre-filter followed by an H10 filter before it reaches the room, so particulate is removed on the way in rather than recirculated afterwards. The G4 stage catches coarse dust and protects the coil behind it; H10 handles the finer fraction. Where local AQI regularly passes 200, the filter section can be specified to a higher grade at design stage.
The published specification is wall-mounted installation. That suits it to retrofit work, because a wall-mounted unit needs only a core-cut through an external wall rather than a concealed ceiling duct route, so it can go into a finished interior without disturbing the ceiling. For new construction, where ducting can be concealed during the build, a ducted ERV is usually the better choice.
Ready to specify? Start with a free site survey.
← Back to all products
Fresh Air · Dehumidification · Water Coil

Fresh Air Dehumidifier
Water Coil Series

The InAir Water Coil Fresh Air Dehumidifier uses filtration, plate heat exchange and water cooling coil treatment. Outdoor fresh air or mixed return/fresh air is filtered, pre-cooled through a plate heat exchanger, dehumidified through a water coil and passed again through the exchanger for sensible heat recovery.

Model: INAD-CW30 / INAD-CW50 · Airflow: 300–500 CMH
InAir Fresh Air Dehumidifier Water Coil Series
✓30 mm foam board shell
✓G4 primary filter and H10 high-efficiency filter
✓Crossflow plate heat exchanger
✓50% sensible plate heat exchange efficiency
✓Built-in drain pan
✓EC fan with two adjustable speeds
✓Water cooling coils for dehumidification
✓Pressure difference gauge alarm or filter reminder option
✓Two air inlets and one air outlet
✓Wall-mounted installation only
✓Left-hand and right-hand type flexibility
Not sure which filtration grade suits your city?

Filter grade depends on local AQI and application. Ask our engineer — tell us your city and building type.

Best Applications
HomesVillasHumid climatesCoastal citiesMonsoon-sensitive spacesPremium bedroomsClinicsSpas and wellness areasOffices
How to Select — Step by Step
Check humidity load
Identify humidity target and latent load.
Confirm water coil availability
Ensure chilled water or suitable coil source is available.
Select CW30 or CW50
Match airflow and dehumidification capacity.
Plan drain and service access
Provide drain pan connection and access door clearance.
Validate left/right configuration
Select orientation based on duct route.
Frequently Asked Questions
Capacity. The INAD-CW30 is rated at 300 CMH and the INAD-CW50 at 500 CMH, and the larger unit also carries higher external static pressure and greater dehumidification capacity. Static pressure matters as much as the airflow figure, because it determines how long a duct run the unit can drive before delivered airflow falls below the rated value. Occupancy sets which one you need.
Yes. The INAD-CW units dehumidify using water cooling coils, so they need a chilled water supply and return alongside a condensate drain. That makes them a natural fit for buildings that already run a chilled water plant. Where no such plant exists, the RHP heat pump range achieves the same active dehumidification using a refrigerant circuit instead, with no external water service required.
Not really. It is a fresh air dehumidifier, so it is sized against ventilation load and humidity load together rather than against room humidity alone. If the requirement is purely to pull moisture out of air already in the room, a standalone dehumidifier is the cheaper answer. If the requirement is dry, filtered outdoor air brought in continuously, this is the right machine.
Revita (INA-MFQR) is the compact ceiling-mounted residential ERV, 150–500 CMH on 220 V single phase, suited to 1–4 BHK apartments and villas. The INA-MFQR-350 is the most commonly installed model for a 3 BHK. Ventura (INA-QRXF) is the larger commercial range, 800–7,500 CMH, with floor-standing options and both single- and three-phase models, for large villas, offices and schools.
CMH is cubic metres per hour — the volume of fresh air delivered. Sizing follows ASHRAE 62.1, roughly 7–10 CMH per person plus an allowance for floor area. As a guide: studio or 1 BHK takes a Revita 150, a 2 BHK a 250, a 3 BHK a 350, and a 4 BHK or villa a 500. Above that the Ventura or RHP ranges cover 800–8,000 CMH. The exact figure comes from your floor plan at the survey.
Choose RHP where outdoor humidity is regularly above 75% — Mumbai, Chennai, Kochi, Kolkata, Visakhapatnam — or where one system has to cover an extreme temperature range, as in Delhi and Chandigarh. A standard Revita ERV is sufficient in moderate-humidity cities such as Hyderabad, Bangalore, Pune, Ahmedabad and Jaipur, where heat recovery alone does the job without active cooling.
You clean the Stage 1 pre-filter every 3–6 months. It is reached through a ceiling panel, rinses under water or vacuums clean, and takes about five minutes with no tools. Beyond that, InAir handles an annual service: MERV-13 or HEPA-13 replacement, heat exchanger cleaning, fan inspection and a performance check. A pressure-differential sensor tells you when a filter is due, so there is nothing to track. MERV-13 and HEPA-13 elements typically last 6–12 months, more often in a Delhi or Kolkata winter.
No. The ceiling is not opened for maintenance. The intake pre-filter captures particulates before they reach the duct network, so the ducts only ever carry filtered air, and continuous positive airflow prevents anything settling. Annual inspection is done through the unit's own ceiling access panel. Deep duct cleaning is rare and is carried out with flexible brushes through the unit, not by cutting the ceiling.
Ready to specify? Start with a free site survey.
← Back to all products
Kitchen & Commercial Extraction

Kitchen Exhaust &
Commercial Extraction Systems

InAir kitchen and commercial extraction systems are designed for removing heat, smoke, grease-laden air, odours, and contaminated exhaust from kitchens, restaurants, hospitality spaces, and utility areas. The range supports high-volume extraction with appropriate static pressure to overcome grease filters, duct bends, and long runs — critical for commercial kitchen performance.

InAir Kitchen Exhaust & Commercial Extraction Systems
✓High-volume extraction fans for commercial kitchen applications
✓Suitable for grease-laden air — compatible with grease filter arrays
✓Options for restaurants, cloud kitchens, hotel kitchens, cafeterias, and food courts
✓Static pressure capability to overcome long duct runs and multiple bends
✓Suitable for utility spaces, service areas, and high-heat environments
✓Available in centrifugal and inline configurations for different layout requirements
✓Can be integrated with make-up air systems for balanced kitchen pressure
✓Corrosion-resistant construction options for grease and moisture environments

Kitchen extraction system specifications depend on kitchen size, cooking load, grease filter type, duct length, and required extraction rate. Contact our team with kitchen dimensions and equipment list for a tailored recommendation.

Download specification sheet Request selection support
RestaurantsHotelsCloud KitchensCafeteriasFood CourtsUtility SpacesCommercial Kitchens
InAir products supplied and installed across India
ERV systems India Energy recovery ventilator Heat pump ERV India IAQ sensor India MERV-13 / HEPA-13 filtration Jet fan basement parking Inline EC fan India Cabinet centrifugal fan HEPA filter box Demand controlled ventilation India Fresh air system Hyderabad Fresh air system Bangalore Fresh air system Mumbai

Not Sure Which Product Fits Your Project?

Ventilation equipment should not be selected only by room size or machine capacity. The right system depends on airflow requirement, occupancy, filtration level, static pressure, duct routing, noise expectations, and IAQ targets. Share your floor plan and project details — our engineers will help you select the right combination.

Cost and maintenance

What does it cost to buy, run and maintain?

Cost follows airflow, filter grade and duct length rather than floor area, so a quote follows a site survey rather than a price list. Three things move the number: the unit itself, which sits well below the cost of the air conditioning it protects; the ducting run; and the filter grade, since HEPA-13 costs more to buy and to maintain than MERV-13. Installing during construction is materially cheaper than retrofitting.
The fan is the only continuous load and it is small — residential units draw tens of watts. Against that, heat recovery of 80–90% means outdoor air arrives near room temperature instead of at outdoor temperature, which reduces air-conditioning load rather than adding to it. In hot Indian summers the recovery saving typically exceeds the fan consumption, so the system is close to self-funding on the electricity bill.
Payback depends on how much air conditioning the building runs. In a sealed, heavily air-conditioned home in a hot city, the reduction in cooling load from pre-conditioning the incoming air is the dominant term and payback is measured in a few seasons. In a mild city like Bangalore the case is made on air quality rather than energy, because the cooling saving is smaller. We will model both figures for your building during the survey.
Filter life is set by local air quality, not by a fixed calendar. In a moderate-AQI city a MERV-13 pre-filter typically runs six to twelve months. In Delhi or Lucknow through the winter season the same filter can load in two to three months. Units with IAQ sensing report differential pressure so the change is driven by measured loading rather than a guess, and filters are a user-replaceable consumable.
Three things. Filters are replaced on loading, as above. The heat exchanger core is washed or vacuumed roughly annually, depending on filtration upstream of it — good pre-filtration keeps the core clean and is the main reason to specify the right filter grade. Condensate drains on units with active dehumidification need an annual check for blockage. There are no other consumables and no annual service contract is required for the equipment to keep working.
Filter changes are designed to be done by the occupant — the access panel is tool-free on residential units and the filters are stocked sizes. Core cleaning and condensate checks are straightforward but easier with a technician, and InAir covers them under an optional annual visit. Nothing about routine maintenance requires the system to be shut down for long or the ducting to be opened.
A loaded filter does not stop the system, it starves it: airflow drops, the fan works harder, and the ventilation rate quietly falls below what the space needs. Because there is no obvious symptom, this is the most common reason an installed system underperforms. It is also why we specify sensor-based monitoring on larger installations — measured airflow makes the problem visible before occupants notice stale air.
The equipment warranty covers manufacturing defects and is not conditional on a paid service contract. It does assume filters are replaced when loaded, since running a unit against a blocked filter for a long period stresses the fan. Keep a record of filter changes and the warranty position is straightforward.
An exhaust fan removes air but does not supply any, so the replacement air arrives uncontrolled through gaps, unfiltered and untreated — in a well-sealed modern building there may be very little of it. A supply-only fresh air fan has the mirror problem: it brings outdoor air in but gives stale air no way out. Balanced ventilation with heat recovery both supplies and extracts, filters what comes in, and recovers energy from what goes out.
HEPA-13 costs more in three places: the filter, the fan energy needed to push air through a denser medium, and the replacement frequency in a high-AQI city. It is the right call where AQI regularly passes 200 — Delhi, Lucknow, Kolkata, Surat — because MERV-13 captures roughly 85% of PM2.5 against HEPA-13 at 99.97%, and at winter concentrations that gap is large in absolute terms.

Further reading