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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

Typical applications

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.

How is InAir RHP — Heat Pump Energy Recovery Air Handling Units sized?

Sizing starts from the air the space actually needs, not from the size of the room. For occupied spaces that means airflow per person under ASHRAE 62.1 — CO2 is produced by people, so a crowded small room needs more air than an empty large one. For process and extract duties it means the required air changes per hour for the activity. Once the airflow is fixed, the duct route sets the static pressure the unit has to overcome, and those two numbers together select the model.

Three things change the answer in India specifically: outdoor temperature at the design peak, which decides how much heat recovery is worth paying for; outdoor humidity, which decides whether passive recovery is enough or active dehumidification is needed; and local AQI, which sets the filter grade — MERV-13 for ordinary urban particulate, HEPA-13 where AQI regularly passes 200. The city pages give the design figures for fifteen Indian cities.

Where does it install?

Installation is cheapest and least disruptive during construction or renovation, when ducting is concealed inside the ceiling void and no finished surface is disturbed. In a completed interior the same result is reached with surface-run ducting in a boxed soffit, or with a standalone unit that needs only a core-cut through an external wall. A typical residential installation is commissioned in ten to twelve days from order.

Every installation includes a site survey, duct design, commissioning with measured airflow readings, and handover. Send a floor plan to sales@in-air.in and we will size it and quote it.

What does it cost to run?

Two figures matter. The fan draws continuous power, which is small — residential units run in the tens of watts. The larger figure is what the unit saves: recovering heat from the air being exhausted means the incoming air arrives closer to room temperature, so the air conditioner does less work. In a Hyderabad summer, incoming air at 44°C reaching the room at 26–28°C is the difference between an AC that copes and one that runs continuously. Filters are the recurring cost, changed on a schedule that depends on local AQI.

Further reading

Product questions

What do specifiers ask about this range?

InAir RHP units combine fresh air treatment, heat recovery, active cooling, heating, dehumidification, and MERV-13 / HEPA-13 filtration into one integ. In practice that means premium villas, schools & campuses, office buildings, healthcare spaces. Selection starts from the duty the space needs rather than from the size of the room: airflow first, then the static pressure the duct route imposes, then filtration and controls. Get those three right and the equipment follows.
Three things. First, direct expansion heat recovery + plate-type heat exchanger. Second, integrated cooling and heating (r410a refrigerant). Third, pre-filter and merv-13 / hepa-13 fine particle filtration (grade by location) included. What matters is not the datasheet but that the specification is chosen for Indian operating conditions — sustained heat, monsoon humidity and a particulate load that shortens the life of equipment designed for a temperate climate.
Five steps, in order. Define the duty — for rhp — heat pump energy recovery air handling units that usually means premium villas, schools & campuses, office buildings, healthcare spaces. Calculate the airflow from occupancy under ASHRAE 62.1 rather than from floor area. Check the static pressure the duct route imposes, which is what separates two units of the same rated airflow. Add the filter grade your city calls for. Then validate against the published performance curve.
Yes, and the survey costs nothing. Send a floor plan with occupancy and intended use to sales@in-air.in and an engineer returns the airflow the space needs, which rhp — heat pump energy recovery air handling units model delivers it, the filter grade your city calls for, and an installed cost. Typical duty for this range is premium villas, schools & campuses, office buildings, healthcare spaces. If the building already ventilates adequately, we say so rather than quoting.