Zehnder ComfoAir Standard 300 / 375 Filters
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OriginalExtract filter size: 500x198x14 mmSupply filter size: 500x198x14 mmFilter class (EN779): G4+F7Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
House brandExtract filter size: 500x198x14 mmSupply filter size: 500x198x14 mmFilter class (EN779): G4+G4Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
House brandExtract filter size: 500x198x14 mmSupply filter size: 500x198x14 mmFilter class (EN779): G4+F7Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
OriginalExtract filter size: 500x198x14 mmSupply filter size: 500x198x14 mmFilter class (EN779): G4+G4Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
1-4 of 4Zehnder ComfoAir standard 300 & 375 MVHR filters: 500x198x14mm
This 500x198x14mm filter set fits the ComfoAir standard 300 and 375 units — part of the wider ComfoAir range. The same size also fits ComfoAir 350, 500 and 550 units.
- G4+F7 (original) — genuine Zehnder G4 extract + F7 pollen supply filter set
- G4+F7 (house brand) — ISO 16890-tested EU alternative, same dimensions and filtration class
- G4+G4 (original & house brand) — basic dust-only pairing for lower-allergy households at a lower price
One filter set covers five ComfoAir models
If your unit is labelled ComfoAir 300, 375, 350, 500 or 550, this is the correct filter set — Zehnder uses a single 500x198x14mm cartridge across this entire sub-family. We recommend checking your filters every 3–6 months for optimal airflow.
Customer Reviews
The experience was seamless, they communicated well, and I got what I ordered quickly. I also found a product that I didn’t know existed, and ordered it as well. All in all, an excellent experience!
Steve SchaferTrustpilot review
Top, fast shipment, good productTim SoenenTrustpilot review
Get what I ordered, cheaper than in my country (post service included).MatejTrustpilot review
Fast and easy to orderPeter PostruznikTrustpilot review
Everything was ok but it took like a week to receive the order when it appeared as completed in the status. Maybe more reliable information on the delivery process would be appreciated.Toni AlmansaTrustpilot review
Most important: No fake shop 🙂 (i wos looking for an impressum and country of operating headquarters). Summary: Fast delivery. Moderate price. Good Quality. Quick and easy purchase. Good online-Shop. I miss Paying with Paypal.Hans-dieter TinhofTrustpilot review
Very good product and good priceCARLOS MARTINSTrustpilot review
Need Help? Start Here.
We’ve gathered answers to the most common questions about our products and services. If you can’t find an answer here, please contact us directly.
Is there an activated carbon filter for Zehnder ComfoAir Q units?
Yes. We stock an original Zehnder activated carbon set for the ComfoAir Q350, Q450, Q600 and E350 (G4+G4 AC). The carbon layer absorbs odours drawn in with the outdoor air — traffic fumes, wood smoke or a neighbour's barbecue — while the G4 media still filters coarse dust. It replaces your standard set, so use it when odours are the main problem and switch back to G4+F7 when fine dust and pollen matter more.
Do Zehnder ComfoAir Q350, Q450 and Q600 units use the same filter size?
Yes. The ComfoAir Q350, Q450 and Q600 — and the ComfoAir E350 — all take the same filter set, available as G4+F7, G4+G4 or an activated carbon version. Older ComfoAir models (70, 160, 180, 200, standard 300/375 and 350/500/550) each take a different size, so check your model on the front panel before ordering.
Why do Zehnder ComfoAir filters need more frequent checks in high-pollen seasons?
Because ComfoAir's F7-class supply filter is specifically designed to capture fine airborne particles including pollen, it can load up faster during spring and early summer than during the rest of the year. Checking filters monthly during peak pollen season, even within the standard 3–6 month replacement window, helps maintain steady airflow and allergy protection.
What filter class does Zehnder use in ComfoAir units?
Zehnder ComfoAir units use two filter classes:
- G4 (ISO Coarse) — protects the heat exchanger; used on the extract side
- F7 (ePM1) — for the supply air, capturing fine dust and pollen
For most ComfoAir models we stock both a G4+F7 set and a G4+G4 set. The G4+F7 set is the better choice for allergy sufferers and homes near busy roads.
How do I find the correct replacement filter for my Zehnder ComfoAir unit?
Find the exact model on the unit's front panel — for example ComfoAir Q350, Q450 or Q600, ComfoAir 350/500/550, ComfoD 350/450/550 or Zehnder EVO. That is the fastest way to match the correct filter set in our catalogue. If the label is missing, measuring the extract and supply filters directly identifies the right size just as reliably.
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