Zehnder ComfoAir 70 is a decentralised ventilation unit with heat and humidity recovery using synchronous supply and extract air operation. It is often used in apartment renovations as well as in new residential builds. The ventilation unit is particularly suited for one- and two-room apartments, vacation and student apartments.
An additional room can be connected to the adjoining room connections for supply or extract air using Zehnder air distribution (optional). An enthalpy exchanger, which ensures a high degree of heat and humidity recovery, is standard on the unit, which has a positive effect on the room humidity and therefore provides a comfortable indoor climate.
Zehnder ComfoAir 70 can be installed with various outside wall hoods or a reveal module for almost invisible integration of the external and exhaust air ducts in the window reveal.

Volume flow: 15–25–40–60 m³/h

Dimensions of interior wall panel (H x W x D): 440 x 660 x 145 mm

Dimensions of outside wall panel (H x W x D): 380 x 376 x 50 mm
Outside wall thickness Min.: 275 to 900 mm
Wall mounting pipe: Ø 250 mm
Length: 600 mm (optionally 900 mm)
Core hole drilling: Ø approx. 270 mm
Fans: DC radial fan
Filter class: Supply/extract air ISO Coarse ≥ 70% (G4) (optionally supply air ISO ePM10≥ 60% (F7))
Heat emitter: Cross-counterflow enthalpy exchanger
Casing: Powder-coated aluminium, RAL 9016, fine structure, matt
Unit core: Expanded polypropylene (EPP)
Electrical connection: 230 VAC/50–60 Hz
Max. current draw: 0.15 A
Power consumption: 4 W to 17 W (standby: < 1 W)
Protection class: II (protective insulation)
Degree of protection: IP20

Energy efficiency: Up to 90% heat recovery, up to 84% humidity recovery
Weight: 22 kg (unit) / 3.8 kg (reveal)
Application: -20 °C to 40 °C
Frost protection: From -5 to -15 °C, unit then switches to standby mode
Control: 4 fan speeds, standby, supply air or extract air operation, filter message, fault message, optional sensor control by means of humidity, VOC and CO2 sensor