17_1/2x17_1/2x1 Exact MERV 10 AC Furnace Filters 6 Pack extension hydrate and calibrate pH probes

hydrate and calibrate pH probes as well as clean and test conductivity (ppm/EC) probes

you retain all the benefits of aeration

You can tell at a glance what operating mode the unit is in: normal (green) or defrost (blue)

Nordic Pure 12x20x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

This product is highly compressed and expands to approximately 60 Liters of material

17_1/2x17_1/2x1 Exact MERV 10 AC Furnace Filters 6 Pack extension hydrate and calibrate pH probesNordic Pure MERV 10 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, allergens and other contaminants are removed. MERV 10 furnace filters are comparable to HVAC filters with the rating of MPR 900 1000. While different companies