ComfoAir Q350
The ComfoAir Q350 is the unit that Passivhaus designers default to. Its measured efficiency, low specific fan power and refined commissioning options justify the price when the building fabric is already paying attention.
- Noise at 1 m
- Below 30 dB(A) at design flow
- Running cost
- £65/yr
- Installed
- £6,500 to £9,500 installed
Editorial render. Not a manufacturer photograph; we do not redistribute press imagery without a licence.
Primary question · When does the Zehnder premium actually earn its money back?
Deep retrofits and new builds where the airtightness test will come in below 1.0 ach.
£6,500 to £9,500 installed
- Class-leading efficiency
- Genuinely low fan power
- The commissioning software does what it claims
- Notably pricier than the Vent-Axia
- Filter pricing is steep
Open the cost planner to estimate your installed price.
Key specifications
- Heat-recovery efficiency
- Up to 96%
- Specific fan power
- 0.20 W/L/s
- Max flow
- 350 m³/h
- Noise at 1 m
- Below 30 dB(A) at design flow
- , Class-leading efficiency
- , Genuinely low fan power
- , The commissioning software does what it claims
- , Notably pricier than the Vent-Axia
- , Filter pricing is steep
If your brief matches "deep retrofits and new builds where the airtightness test will come in below 1.0 ach.", the ComfoAir Q350 is a confident pick. If it doesn't, the alternatives above are more honest answers.
Estimate your installed cost
The planner uses your specific home; not a brochure number.