17x27x1 Exact MERV 8 AC Furnace Filters 6 Pack cleanroom The number of units required

The number of units required depends on your total system airflow (CFM) and the severity of the odor or pollution problem

The 90R spectrum is a high efficiency

It does not stop there

there are more nutrients and oxygen available for roots

Bottom inlet has removable screen for easy cleaning

17x27x1 Exact MERV 8 AC Furnace Filters 6 Pack cleanroom The number of units requiredNordic 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