20x28x1 Exact MERV 13 AC Furnace Filters 6 Pack Liquid & Weight Measuring It has a built-in 1%

It has a built-in 1% RH deadband and is ETL-listed

both yields and overall plant quality can be greatly enhanced-leading to higher profits for the cultivator

Maximum Capacity: 17

Excellent to use on your indoor and outdoor plants

Because it repels insects rather than kills them

20x28x1 Exact MERV 13 AC Furnace Filters 6 Pack Liquid & Weight Measuring It has a built-in 1%Nordic Pure MERV 13 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, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200