22x28x1 Exact MERV 8 AC Furnace Filters 6 Pack eligible-for-discount The RH sensing element is

The RH sensing element is protected against dust

Inside Dimensions: 16" x 40" x 4

pump to create spray pressure

the addition of water absorbant granulate to peat mixes at 25-50% volume increases water holding capacity and aeration

22x28x1 Exact MERV 8 AC Furnace Filters 6 Pack eligible-for-discount The RH sensing element isNordic 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