18x24x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack shoe-cover With a passive thermal management

With a passive thermal management system directing heat away from your crop

Four Seedling Trays -  providing both auto-watering capability and aeration in one great tray

Regulates air flow with two adjustable vents that allow you to adjust temperature and humidity

• Slant-ground

TIP OVER switch shuts off gas source if the unit falls or tips over

18x24x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack shoe-cover With a passive thermal managementNordic Pure 18x24x4 MERV 8 Pleated Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon