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Ultra thick at 7
Using the heat mat together with our SunPack™ Heat Mat Temperature Controller (item SPTEMP) gives gardeners the best possible control of temperature and humidity
Works best in warm weather (60°F+)
The sachet’s EthylBloc™ technology leaves no trace or residue after treatment is completed
Fit around the sides of the greenhouse or between rows
22x30x1 MERV 14 AC Furnace Filters 6 Pack Extension Ultra thick at 7Nordic Pure MERV 14 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, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.