ComfoAir Q350
Residential heat recovery ventilation system.
Technical Identification
- Manufacturer: Zehnder
- Product: ComfoAir Q350
- Product type: Residential heat recovery ventilation system
- Application: Fresh-air supply and extract with heat recovery where installed as designed
- Capacity and performance: Refer to the original technical data for the exact ordering code, fan speed and external static pressure.
What to Verify
Check the installation market, airflow versus static pressure, thermal recovery conditions, filter specifications, power supply, noise, frost strategy, condensate drainage and compatibility with controls and ductwork. Stated or nominal airflow should not be confused with guaranteed installed airflow.
Official Technical Reference
Manufacturer product and documentation source →
Independent AirAlign technical catalog. Check the current manufacturer’s product documents and regional availability; technical parameters may differ between model variants.
ComfoAir Q350 — exact service-manual specification
| Selection point | Official model data and interpretation |
|---|---|
| Maximum / minimum flow | 350 m³/h manufacturer maximum; minimum 75 m³/h without the preheater operating or 100 m³/h with it operating. Installed airflow still depends on the external static pressure and filter condition. |
| Thermal efficiency | 92% as reported under EN 13141-7:2010 in the specified Zehnder service-manual revision. Do not transfer this percentage to arbitrary installed ductwork or a different enthalpy core. |
| Electric supply | 230 V ±10%, single-phase, 50–60 Hz. Maximum power excluding the preheater: 180 W; total with electric preheater is considerably higher, so branch protection must match the exact unit. |
| Duct connection | 160 mm internal diameter (outside connection 190 mm). Condensate drain 32 mm tube or 1¼-inch thread on the standard exchanger variant. |
| Filters / environment | Outside-air F7 (ePM1 / MERV13) and extract-air G4 (coarse / MERV8) indicated by this manual; IP40, installation area 0…45°C, non-condensing relative humidity under 90%. |
| Variant and controls | Zehnder ST is a fixed-port design and TR indicates turnable air connections subject to model availability. Optional enthalpy heat-exchanger (‘ERV’) and ComfoNet controls must not be treated as universal inclusions. |
At 350 m³/h, the manufacturer’s maximum airflow is not the same as rated flow at the project’s pressure drop. The same published family table gives Q350/Q450/Q600 different heat recovery, fan electrical loading and duct dimensions. Select based on fan curve, sound power, seasonal frost behaviour and filter service access; commissioning must balance supply and extract.
Zehnder ComfoAir Q service manual — technical specification table. Original manufacturer documentation, reviewed 26 October 2026.