16_1/4x21_1/2x1 Exact MERV 8 AC Furnace Filters 6 Pack chillers-heaters-and-purification these plant-safe 5

these plant-safe 5

Fans are set to exhaust air out the frame but this can be reversed to intake air using a screw driver

A built-in data logger records minimum and maximum temperature

plant growth

This very strong

16_1/4x21_1/2x1 Exact MERV 8 AC Furnace Filters 6 Pack chillers-heaters-and-purification these plant-safe 5Nordic Pure MERV 8 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters