Compact heat pump ventilation unit for tight spaces

WESTON-AV-HCVENT-W-400 is a heat pump ventilation unit that combines heat recovery ventilation and a DC inverter heat pump. The unit ensures a continuous supply of fresh and filtered air in the home. In winter, it heats the supply air, and in summer, it cools it, so the fresh air does not enter the room too cold or too hot. In addition, the device removes excess moisture from the air. The unit is only 450 mm wide and is floor-mounted, so no space or work is required under the ceiling. Such a compact heat pump ventilation unit is well suited for apartments, townhouses, and smaller detached houses where the utility room is small.

Main advantages

• Only 450 mm wide – fits into a narrow niche, storage room, or technical room.
• Heating and cooling – nominal heating capacity 3.96 kW and cooling capacity 3.67 kW.
• Quiet – noise level only 37/42 dB(A).
• Hexagonal counterflow enthalpy heat exchanger recovers both heat and moisture from the exhaust air.
• DC inverter compressor and EC fans operate energy-efficiently. You can choose between 10 speeds and 5 operating modes, and the COP is over 6.
• Automatic bypass valve switches the device to 100% fresh air mode in suitable weather.
• Operates at outside temperatures from −15 °C to +50 °C, complies with ErP 2018 requirements and uses R32 refrigerant.

Easy installation

The heat pump ventilation unit is connected to ducts via side horizontal connections with a diameter of Ø195 mm. Fewer bends mean lower pressure drops and quieter operation. The unit uses a standard 220 V single-phase power supply.

Smart leadership

The heat pump ventilation unit can be controlled via a touch-sensitive wall panel or the Smart Life app, available in the Google Play and App Store. The device supports Wi-Fi and Zigbee connectivity, as well as Amazon Alexa and Google Assistant. Air quality can be monitored using CO₂, humidity, TVOC, and PM2.5 sensors. Additional features include:

• temperature and humidity control,
• weekly timer and scenarios,
• group management,
• RS485 interface,
• weather forecast-based management,
• automatic defrost,
• filter change and fault notifications.

Technical data

Nominal airflow	400 m³/h
Extraction air volume (ventilation / heating-cooling)	400 / 400 m³/h
External static pressure	100 Pa
Ventilation mode
Temperature efficiency (heating / cooling)	77% / 71%
Enthalpy efficiency (heating / cooling)	75% / 65%
Input power / current	185 W / 1.67 A
Cooling
Nominal / maximum cooling capacity	3,67 / 3,91 kW
Input power / operating current	850 W / 4.61 A
Fuel
Nominal / maximum heating capacity	3.96 / 4.21 kW
Input power / operating current	730 W / 4.04 A
General information
Noise level	37/42 dB(A)
Toilet	220 V, 1 phase, 50/60 Hz
Dimensions (L × W × H)	1300 × 450 × 865 mm
Weight	130 kg
Channel connection diameter	Ø195 mm
Vent height / base height	40 / 40 mm
Drain pipe	G1/2, 21 mm
Refrigerant / quantity	R32 / 320 g
Operating temperature	-15 to +50 °C

Need a larger air volume? Check out the WESTON-AV-HCVENT-W-1100 (1100 m³/h) model as well.