Zehnder
Zehnder Group AG · Founded 1895 · Switzerland
At a Glance
"Passive house & best-in-class efficiency"
Our Expert Review
Zehnder is the gold standard for residential heat and energy recovery ventilation. The Swiss manufacturer has been perfecting the technology since 1895 and their ComfoAir Q series is the unit specified by virtually every Passive House project in North America. With sensible recovery efficiencies exceeding 92%, lifetime warranty on the enthalpy core, and noise levels under 25 dB at low speed, nothing else in the residential market comes close on pure performance. The catch is price — a complete ComfoAir Q 350 install with the ComfoTube duct system runs $8,000-$12,000 installed. For Long Island clients building tight new construction or doing deep energy retrofits where ventilation quality matters, Zehnder is worth every penny.
Pros
- Industry-leading 92%+ sensible recovery efficiency
- Whisper-quiet operation (under 25 dB at low speed)
- Lifetime warranty on enthalpy core
- Passive House certified
- Premium German/Swiss engineering & build quality
- ComfoTube semi-rigid duct system minimizes airflow losses
Cons
- Premium price point — easily 2-3x competitors
- Requires Zehnder-trained installer
- Proprietary duct system locks you into ecosystem
- Long lead times for parts in North America