ComfoD 350 / 300
The Zehnder ComfoD 350 / 300 comfort ventilation unit was developed for use in demanding residential and commercial buildings. It combines maximum comfort, simple operation, high efficiency and flexible integration into building services. The ComfoD 350 / 300 ventilation unit delivers between 40 and 400 m³/h of air at an external pressure of 100 Pa.
Available products
Hygiene Starter Pack – Zehnder ComfoAir 300-550 | Zehnder Original
Filter set (Starter Pack) for keeping your indoor air clean and protecting your ventilation system against pollution - ePM1 (F7) / CRS (G4)
Catalogue number: 400102112
On stock
Product generally delivered within 2-5 working days
EUR
65.95
incl. VAT
excl. shipping fees
Hygiene Refill Pack – Zehnder ComfoAir 300-550 | Zehnder Original
Filter set (Refill Pack) for keeping your indoor air clean and protecting your ventilation system against pollution - ePM1 (F7) / CRS (G4)
Catalogue number: 400102115
On stock
Product generally delivered within 2-5 working days
EUR
37.50
incl. VAT
excl. shipping fees
Get your product with a 15% discount
Subscribe and re-order automatically and periodically! (Offer exclusively for private customers)
EUR
31.87
37.50
incl. VAT
excl. shipping fees
System Protection Starter Pack – Zehnder ComfoAir 300-550 | Zehnder Original
Filter set (Starter Pack) to protect your ventilation system against dirt and provide extra comfort at home - CRS (G4) / CRS (G4)
Catalogue number: 400102110
On stock
Product generally delivered within 2-5 working days
EUR
61.71
incl. VAT
excl. shipping fees
System Protection Refill Pack – Zehnder ComfoAir 300-550 | Zehnder Original
Filter set (Refill Pack) to protect your ventilation system against dirt and provide extra comfort at home - CRS (G4) / CRS (G4)
Catalogue number: 400102113
On stock
Product generally delivered within 2-5 working days
EUR
33.50
incl. VAT
excl. shipping fees
Get your product with a 15% discount
Subscribe and re-order automatically and periodically! (Offer exclusively for private customers)
EUR
28.48
33.50
incl. VAT
excl. shipping fees
Anti Pollen Starter Pack – Zehnder ComfoAir 300-550 | Zehnder Original
Filter Set (Starter Pack) to protect your indoor air from particles that can trigger allergic respiratory reactions, such as pollen and particles from woodstoves - ePM10 (M5) / CRS (G4)
Catalogue number: 400102111
On stock
Product generally delivered within 2-5 working days
EUR
64.01
incl. VAT
excl. shipping fees
Anti Pollen Refill Pack – Zehnder ComfoAir 300-550 | Zehnder Original
Filter Set (Refill Pack) to protect your indoor air from particles that can trigger allergic respiratory reactions, such as pollen and particles from woodstoves - ePM10 (M5) / CRS (G4)
Catalogue number: 400102114
On stock
Product generally delivered within 2-5 working days
EUR
35.50
incl. VAT
excl. shipping fees
Get your product with a 15% discount
Subscribe and re-order automatically and periodically! (Offer exclusively for private customers)
EUR
30.18
35.50
incl. VAT
excl. shipping fees
Hygiene Filter Set – Zehnder ComfoAir 300-550 | Zehnder Original
Filter set for keeping your indoor air clean and protecting your ventilation system against pollution - ePM1 (F7) / CRS (G4)
Catalogue number: 400100084
On stock
Product generally delivered within 2-5 working days
EUR
55.96
incl. VAT
excl. shipping fees
Get your product with a 15% discount
Subscribe and re-order automatically and periodically! (Offer exclusively for private customers)
EUR
47.57
55.96
incl. VAT
excl. shipping fees
System Protection Filter Set – Zehnder ComfoAir 300-550 | Zehnder Original
Filter set to protect your ventilation system against dirt and provide extra comfort at home - CRS (G4) / CRS (G4)
Catalogue number: 400100085
On stock
Product generally delivered within 2-5 working days
EUR
52.76
incl. VAT
excl. shipping fees
Get your product with a 15% discount
Subscribe and re-order automatically and periodically! (Offer exclusively for private customers)
EUR
44.84
52.76
incl. VAT
excl. shipping fees
Anti Pollen Filter Set – Zehnder ComfoAir 300-550 | Zehnder Original
Filter set to protect your indoor air from particles that can trigger allergic reactions, such as pollen and particles from woodstoves - ePM10 (M5) / CRS (G4)
Catalogue number: 400102097
On stock
Product generally delivered within 2-5 working days
EUR
54.37
incl. VAT
excl. shipping fees
Get your product with a 15% discount
Subscribe and re-order automatically and periodically! (Offer exclusively for private customers)
EUR
46.21
54.37
incl. VAT
excl. shipping fees
More to know about ComfoD 350 / 300
Filter Replacement Guide – Zehnder ComfoAir ComfoAir 350, ComfoD 350
-
Switch off the unit
Turn off the ventilation unit.
→ The fans will stop completely. -
Open the filter covers
Open the filter covers to access the filter compartments. -
Remove the old filters
Carefully pull the used filter inserts out of the slots. -
Clean the filter frames and insert new filters
- Open the reusable filter frames.
- Remove the used filter inserts.
- Clean the filter frames if necessary, e.g., by vacuuming or wiping with a dry cloth.
- Place the new filter inserts into the frame.
- Close the filter frame securely.
⚠️ Always use original Zehnder filters to ensure proper operation of the unit.
ℹ️ Recommendation: Check and replace the filters every 3–6 months, depending on operating conditions.
-
Close the filter covers
Reattach the filter covers and ensure they snap into plac
Zehnder ComfoAir ComfoAir 350, ComfoD 350
- Comfort ventilation for demands up to 370 m³/h
- Heat recovery with an efficiency of more than 90%
- Low power consumption thanks to DC motors
- Automatic 100% summer bypass
- Frost protection function: efficient even at low temperatures
- Quick, safe installation and servicing
- Integrated preheater and humidity control (optional)
- Wireless remote control and filter replacement indicator
- Geothermal heat exchanger control
- Low minimum air volume, specially designed for single family houses
- Digital Ease or Luxe control unit
- Passivhaus Institut accredited