12x22x1 Exact MERV 8 AC Furnace Filters 12 Pack special-order Fans contain a PWM-controlled motor

Fans contain a PWM-controlled motor used to minimize noise during speed variations and are suspended in mid-air with silicone mounts to absorb vibrations

Developed in Sonoma

pH and temperature readings are time and date stamped

This ancient source of plant food has proven itself over the ages to be an effective way to achieve a successful harvest

Recommended for indoor or outdoor growing situations

12x22x1 Exact MERV 8 AC Furnace Filters 12 Pack special-order Fans contain a PWM-controlled motorNordic 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