envelopelearning@mainstreamcorporation.com phone303-912-4833
G4 Filter, MERV 8 - winter filter for supply or exhaust and bypass filter used in summer
F7 Filter, MERV 13 - summer pollen filter for supply only
The filter replacements are for the ComfoAir 200 ERV Device. It is recommended to order the filters in quantities of two so both filters in the units are replaced at the same time to ensure optimal indoor air quality in the home.
The ComfoAir 200 G4 Filter is a MERV 7/8. The F7 Filter is MERV 13 and can be used on the fresh air intake.
Mainstream Corporation is a Colorado based Passive House Design, Consulting firm. Specializing in Passive House Products for your building project.
