
Description
Zehnder ComfoAir 155 WM
Product Part Number:
- Zehnder ComfoAir 155 WM for wall or cupboard mounting - CA155WM-GB
Description
The Zehnder ComfoAir 155 WM is a wall-mounted MVHR unit suitable for properties up to 150m² and manufactured in Germany to the highest standards.
This unit comes with an A+ energy rating, making it highly efficient for your home or business.
BPC Ventilation is the largest independent MVHR specialist, providing lifetime technical support on all of our high-quality systems.
Key Features
- Suitable for home sizes up to 150m²
- Airflow rate @ 100Pa: 285m³/h
- 93% heat recovery efficiency
- 100% full and filtered modulating summer bypass
- Internal humidity sensor for automatic adjustments
- Left- or right-hand configuration through software
- 100% variable AUX speed for use as way mode, medium speed, or purge boost
- BMS compatibility option for integrated control
- Volt-free contact for flexible connections
- Adaptive comfort technology for personalized comfort
- G3 filtration for clean air
- Tool-free filter access for easy maintenance
- SAP Appendix Q listed
Controllability
The Zehnder ComfoAir units come with optional boost switches and room sensors for demand-controlled ventilation.

Inputs
- Volt free contact boost capability.
- 240v switched live capability
Wall Controllers
There are 3 options for additional wall controllers:
-
Zehnder ZGRC1:
- Two-position switch for manual flow rate selection
- Summer bypass and frost protection indicators
- Service and maintenance alerts
- Automatic return to low speed after a preset time
-
Zehnder ZGS1:
- Three-position switch for flow rate selection
-
Zehnder ZGS2:
- Two-position switch for flow rate selection
Room Sensors
-
Zehnder AQR: Remote air quality sensor that increases flow rate automatically based on pollutants (hydrogen, CO, methane, etc.)
- Adjustable overrun timer (2-40 minutes)
-
Zehnder PIRR: Passive infra-red movement sensor that increases flow rate based on detected movement (up to 7m)
- Adjustable overrun timer (2-40 minutes)
-
Zehnder HHR: Humidity sensor that increases flow rate based on relative humidity (30-90%)
- Adjustable overrun timer (2-40 minutes)
-
Zehnder THR: Temperature sensor that increases flow rate based on temperature (5-35°C)
- Fixed 2-minute overrun timer
BMS Control
BMS integration is available for seamless control within larger systems.
Integral Humidity Sensor
The built-in humidity sensor adjusts fan speed in proportion to relative humidity levels, saving energy and reducing noise.
Installation
- Wall bracket included for easy mounting
- Special pod wall / cupboard mounting option available, ideal for secure installation during pod transportation
Construction
- Manufactured from EPP with plastic outer covers for lightweight durability
Motors
Equipped with quality EC motors for efficient, low-energy operation
Filtration
- 2 x G4 filters fitted to the unit
- Optional G4 to air supply
Summer By-Pass
- 100% summer bypass for optimal cooling in the warmer months
Low Noise Levels
Designed with quiet operation in mind for maximum comfort

Heat Exchanger
The unit features a high-efficiency heat exchanger for improved energy recovery

Frost Protection
Equipped with a frost protection programme for safe operation in cold conditions
Orientation
The unit can be left- or right-hand configured through software without requiring mechanical adjustments

Warranty
- 2-year warranty with the option to extend to 6 years by registering on the Zehnder website within 6 months of purchase
Approvals
The Zehnder ComfoAir 155 WM is SAP Appendix Q listed
Accessories
Full range of accessories available to complete your system setup.

Further Information
For more details, please visit the Zehnder website.
Video
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Inputs
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