Description
Zehnder ComfoAir 155WM – Wall-Mounted MVHR Unit
The Zehnder ComfoAir 155WM-GB is a compact mechanical ventilation with heat recovery (MVHR) unit for flats, apartments and smaller houses. Previously marketed as the Greenwood Vireo HR155WM, this model may appear under either name in older specifications, drawings and replacement enquiries following Zehnder's acquisition of Greenwood.
Designed for discreet wall or cupboard installation, including kitchen cupboards, it provides balanced whole-home ventilation with heat recovery. The manufacturer's stated application covers properties up to 125 m²; final selection should be based on the required airflow and system resistance.
Key features
- Compact wall-mounted heat recovery ventilation unit for apartments and small homes
- Left- or right-hand configuration selectable through software without mechanical alteration
- Full, filtered summer bypass
- Independently tested sound data
- Wall, cupboard and kitchen-cupboard installation options
- Optional pod mounting arrangement for off-site construction
- BMS capability and tool-free filter access
- Variable auxiliary speed for away, medium or purge-boost operation
Model identification and compatibility
Current model: Zehnder ComfoAir 155WM-GB
Former Greenwood name: Vireo HR155WM
EpicAir SKU: CA155WM-GB
Searching for a Greenwood HR155WM replacement? This listing retains the historical Greenwood name to help identify the model. Check the full model code, handing, controls and installation requirements before ordering; similar names do not by themselves guarantee interchangeability.
Choosing the right MVHR unit
For installers, developers and homeowners, EpicAir can help check the required ventilation rate, available mounting space and ductwork layout. Refer to the manufacturer datasheet and installation instructions for detailed performance and commissioning information.
Commissioning and maintenance videos
| Brand | GREENWOOD (CAT 61) |
| Guarantee | 2 Year |
