Zehnder G4 Filter for ComfoAir 350/550 & Later ComfoFond Series
Zehnder G4 Filter for ComfoAir 350/550
Zehnder G4 Standard Particle filter, equivalent to MERV 7/8 filter.
Zehnder Part # 9240
Need help to change your Zehnder HRV or ERV filter?
Watch this Small Planet Supply informational video on changing your HRV or ERV filter. You can also learn about how to perform routine maintenance (including how to change your HRV or ERV filter with Small Planet Supply's Small Planet University Zehnder Routine Maintenance Course.