16_1/2x21_5/8x1 Exact MERV 10 AC Furnace Filters 6 Pack ventilation and ducting In warm and humid environments
Baker’s notes & crumb story
Description
16_1 2x21_5 8x1 Exact MERV 10 AC Furnace Filters 6 Pack ventilation and ducting In warm and humid environments In warm and humid environments they reproduce quickly Note: To increase efficacy keep filter clean and greenhouse humidity levels below 75%