26x30x1 MERV 7 AC Furnace Filters 6 Pack AC / Dehumidification / Humidification There are four precision thermal

There are four precision thermal probes included

Multiple purposes assigment

White perlite granules are the result of the expansion of combined water vaporizing in the crude mineral and forming enclosed air pockets

Hydroponic growers know that Big & Chunky is the ultimate hydroponic grow medium

Growers can also greatly reduce cleaning time and expenditure

26x30x1 MERV 7 AC Furnace Filters 6 Pack AC / Dehumidification / Humidification There are four precision thermalNordic 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