Filter set includes G4 and Merv 7/8 filter for Zehnder ComfoAir 350, 450 or 600. G4 Filters are an equivalent to a MERV 7-8 filter, while the F7 Filters are an equivalent to a MERV 13 filter. ComfoWell Casing filters are available in G4, F7, F9 (MERV 15) and charcoal options.
Need to change your 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.