21x27x1 Trane Replacement MERV 8 AC Furnace Filters 6 Pack X Nutrients Grow Spray 1 Gal - Adjustable CO2 set point

- Adjustable CO2 set point from 100 to 4

An easy-to-fill reservoir delivers water and nutrients from below

brown spot

Stand alone

Includes key-operated remote control for the triple nozzle head

21x27x1 Trane Replacement MERV 8 AC Furnace Filters 6 Pack X Nutrients Grow Spray 1 Gal - Adjustable CO2 set pointNordic 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