Zehnder ComfoSpot 50 Filters
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OriginalExtract filter size: 182x123x20 mmSupply filter size: 182x123x20 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
1-1 of 1Zehnder ComfoSpot 50 filters: 182x123x20mm
ComfoSpot is Zehnder’s compact range, designed for single rooms rather than whole-house ventilation like the ComfoAir series — part of the wider Zehnder filter selection. The ComfoSpot 50 filter set measures 182x123x20mm.
- G4+F7 (original) — genuine Zehnder set with G4 extract filter and F7 pollen supply filter
Why single-room units still need regular filter changes
Even compact, single-room ventilation units rely on clean filters to maintain airflow and avoid drawing extra power from a clogged fan. We recommend checking your filters every 3–6 months to ensure quiet operation and efficient heat recovery.
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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.
Do you offer H13 HEPA-grade filters for Zehnder ComfoAir units for severe allergy sufferers?
Yes, several ComfoAir models can accept an H13 HEPA-grade supply filter in place of the standard F7/ePM1, giving a meaningfully higher level of fine particulate and allergen capture for severe allergy or asthma sufferers. Check your specific Q-model's fan capacity first, since HEPA-grade media has higher airflow resistance than standard filtration.
Do Zehnder ComfoAir Q350, Q450 and Q600 units use the same filter size, or does it change by model?
Filter dimensions scale with the Q-series model number, so a Q350 takes a different size than a Q450 or Q600 even though all three use the same M5(ePM10)/F7(ePM1) filtration logic. Always confirm your exact Q-model on the front panel before ordering rather than assuming size compatibility across the range.
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 recommend for ComfoAir units?
Zehnder ComfoAir units are typically fitted with two filter classes as standard:
- M5 (ePM10) extract filter
- F7 (ePM1) supply filter
This reflects the brand's strong focus on Passive House-grade air quality — many allergy-sensitive households upgrade further where the housing supports higher-grade filtration.
How do I find the correct replacement filter for my Zehnder ComfoAir unit?
The exact ComfoAir model — such as Q350, Q450 or Q600 — is printed on the unit's front panel and is the fastest way to match the correct filter set in our catalogue. If the label is missing, measuring the extract and supply filter panels directly will identify the right size just as reliably.
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