The Zehnder ComfoAir 155 WM is a heat recovery unit designed to enable better and easier specification of ventilation in new properties. It contains features such as its automatic true summer by-pass, high heat recovery efficiency and integrated humidity sensor to provide a comfortable, healthy and energy-efficient indoor climate.


Key Features:

  • Left or right hand configuration through software alone, no mechanical alteration required
  • 100% full and filtered summer bypass
  • Modern, discreet design
  • Easy installation to wall, cupboard or kitchen cupboard
  • Light to handle
  • BMS capability
  • Tool free filter access
  • Volt free contact boost capability
  • CommissionSMART™ is a commissioning wizard that enable a quick and simple set-up process
  • SummerSMART™ ensures automatic full by-pass activation providing filtered supply air 365 days a year
  • TimerSMART™ eliminates nuisance noise and over-ventilation by determining the duration of occupancy and allocating a suitable overrun time
  • HumidiSMART™ continuously monitors the humidity level within the home and looks for a man-made spike before boosting the unit, irrespective of distance or dilution




Before ordering MVHR products, we recommend a consultation with our MVHR Specialists.

Call: +353 (0)46 9029 444


Zehnder ComfoAir 155 WM Heat Recovery Unit