ᐅ Controlled Residential Ventilation System – Decision Guide
Created on: 22 Oct 2017 11:14
B
baumhaus815
Hello everyone,
We have decided to build with GÜ, and construction is about to start soon. Now we need to choose a specific mechanical ventilation with heat recovery system.
The single-family house has three floors (basement, ground floor, upper floor), and the floor area of each level is about 80 sqm (860 sq ft). The mechanical ventilation system is planned only for the ground and upper floors, not for the basement.
We are currently choosing between two systems: the Zehnder Comfoair Q350 and the Wolf CWL-300. The Wolf system would be 1,700 euros cheaper overall (including ductwork, installation, etc.).
From what I understand, the Comfoair Q350 is the newer system, has lower noise levels, and a higher heat recovery efficiency. Additionally, it is dimensioned for 50 m3 (1,765 cu ft) more airflow than the CWL-300, which might mean it could run at a lower fan setting during normal operation, making it quieter and more economical.
Our considerations now are: Do the lower measured noise levels actually make a noticeable difference in everyday use (or only under laboratory conditions)? Regarding the system sizing: In theory, 300 m3 (10,595 cu ft) max capacity would be sufficient for us, but would 350 m3 (12,366 cu ft) be better in practice? Ultimately, the Comfoair Q350 is probably the better system, but we wonder if the additional 1,700 euro cost is worth it for our house.
Which mechanical ventilation with heat recovery system would you recommend as experts? As non-professionals, it’s quite difficult for us to make the right choice.
Thanks in advance!
We have decided to build with GÜ, and construction is about to start soon. Now we need to choose a specific mechanical ventilation with heat recovery system.
The single-family house has three floors (basement, ground floor, upper floor), and the floor area of each level is about 80 sqm (860 sq ft). The mechanical ventilation system is planned only for the ground and upper floors, not for the basement.
We are currently choosing between two systems: the Zehnder Comfoair Q350 and the Wolf CWL-300. The Wolf system would be 1,700 euros cheaper overall (including ductwork, installation, etc.).
From what I understand, the Comfoair Q350 is the newer system, has lower noise levels, and a higher heat recovery efficiency. Additionally, it is dimensioned for 50 m3 (1,765 cu ft) more airflow than the CWL-300, which might mean it could run at a lower fan setting during normal operation, making it quieter and more economical.
Our considerations now are: Do the lower measured noise levels actually make a noticeable difference in everyday use (or only under laboratory conditions)? Regarding the system sizing: In theory, 300 m3 (10,595 cu ft) max capacity would be sufficient for us, but would 350 m3 (12,366 cu ft) be better in practice? Ultimately, the Comfoair Q350 is probably the better system, but we wonder if the additional 1,700 euro cost is worth it for our house.
Which mechanical ventilation with heat recovery system would you recommend as experts? As non-professionals, it’s quite difficult for us to make the right choice.
Thanks in advance!
Baumfachmann schrieb:
If you want it to be quiet, then Zehnder, tip:
Air inlet in the floor, exhaust valves in the ceiling.
Place the supply and exhaust outlets on the east or north side. Not on the west side.Why not on the west side? We currently have them on the west.B
Baumfachmann19 Jan 2018 18:03That is the weather-exposed side