28x28x1 MERV 14 AC Furnace Filters 6 Pack spl_allstate significantly increases durability• Backed by

significantly increases durability• Backed by Apera's proprietary sensor technology from Switzerland• Easy-to-use design and fast calibration adjustment• Replaceable Swiss LabSen Spear Soil pH Probe• Large 3-color backlit screen gives you clear information• Durable structure

1 static brush by Harvest More to collect pollen

depending on soil conditions and worm population density

It uses no electricity at all—no air pumps or water pumps needed

28x28x1 MERV 14 AC Furnace Filters 6 Pack spl_allstate significantly increases durability• Backed byNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.