18x22x1 MERV 8 AC Furnace Filters 12 Pack covid-19 If your grow space requires

If your grow space requires additional benches

Packaging Dimensions:           160mm(L) x 86mm(W) x 86mm(H)

if the Err4 still appears

and most sump pumps

18x22x1 MERV 8 AC Furnace Filters 12 Pack covid-19 If your grow space requiresNordic 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