15x25x1 MERV 7 AC Furnace Filters 6 Pack double-ended a warning symbol will blink

a warning symbol will blink to indicate low battery condition

Available in Biomin Calcium and Biomin Iron

Easily attach the included tubing to a fan for even CO2 distribution throughout your grow room

This system can also reduce humidity levels to prevent mold growth

Encourages healthy plant growth processes

15x25x1 MERV 7 AC Furnace Filters 6 Pack double-ended a warning symbol will blinkNordic Pure MERV 7 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 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters