Zehnder ComfoAir Q450
The mid-size ComfoAir Q unit — up to 96% heat recovery with extra airflow for larger homes.
Overview
The ComfoAir Q450 shares the ComfoAir Q platform — the diamond-shaped counter-flow exchanger (up to 96% heat recovery), automatic filtered bypass, EC fans and Passive House certification — with a higher airflow ceiling than the Q350 to suit larger homes. Choose between sensible and enthalpy exchangers depending on your climate.
Key features
- Up to 96% heat recovery via a diamond-shaped counter-flow exchanger
- Higher airflow ceiling than the Q350 for larger homes
- Automatic 100% filtered summer bypass
- EC fans with constant-volume flow control
- Sensible or enthalpy exchanger options
- Certified Passive House component (Passivhaus Institut)
Suitable applications
- Larger new homes requiring higher whole-house airflow
- High-performance and Passivhaus builds
- Whole-house balanced ventilation
Technical specifications
| Maximum airflow | Up to 450 m³/h |
|---|---|
| Heat recovery efficiency | Up to 96% (sensible) |
| Heat exchanger | Diamond-shaped counter-flow (enthalpy optional) |
| Fans | EC, constant-volume flow control |
| Filters | Extract G4 / Supply F7 |
| Duct connections | 4 × ø160 mm spigots |
| Condensate | 32 mm connection |
| Weight | 50 kg |
| Bypass | Automatic 100% filtered (proportional) |
| Certification | Passivhaus Institut certified component |
Headline figures — see the datasheet for full performance and dimensional data.
Downloads
Zehnder ComfoAir Q — Brochure (PDF)
Brochure · PDF · 1.4 MB
Zehnder ComfoAir Q — Quick guide (PDF)
User manual · PDF · 664 KB
Zehnder ComfoAir Q — Service & installation manual (PDF)
Installation manual · PDF · 2.6 MB
Zehnder ComfoAir Q — Controls guide (PDF)
User manual · PDF · 726 KB
Zehnder ComfoConnect Pro — Manual (PDF)
Installation manual · PDF · 3.3 MB
Filters & maintenance
Clean filters keep incoming air fresh, protect the heat exchanger and keep the unit running efficiently. Most units need replacement filters every 6–12 months depending on the model and local air quality. We supply the correct filter sets for the Zehnder ComfoAir Q450.
Replacement filters →Smart control with Zehnder ComfoConnect Pro
The ComfoConnect Pro is a Modbus, internet and app interface that brings your ComfoAir Q into the smart home. It connects to the unit wired (ComfoNet and LAN) or wirelessly over WiFi, enabling local and remote control through the free Zehnder app, plus direct integration with home-automation systems such as Loxone and SmartPlace and a connection to the Zehnder Cloud.
- Local and remote control via the free Zehnder app (iOS & Android)
- Wired (ComfoNet / LAN) or wireless (WiFi) connection
- Modbus RTU/TCP for building-automation and smart-home systems
- Direct integration with Loxone, SmartPlace and the Zehnder Cloud
- Compatible with Zehnder ComfoAir Q and ComfoAir Flex
- Advanced security with cryptographic keys and automatic software updates
FAQs
Service or commission your Zehnder ComfoAir Q450
Annual servicing, filter replacement, commissioning and diagnostics across South Australia — including units we didn’t install.