14x24x2 Pleated MERV 13 Air Filters 12 Pack pumps-&-irrigation On the backside are ports

On the backside are ports to connect and control additional fans

The difference is in the carbon

The PAR sensor can be incorporated into the Hydro-X Plus system to provide a measurement of “PAR” ( Photosynthetically Active Radiation )

exhausting bathrooms and attics

14x24x2 Pleated MERV 13 Air Filters 12 Pack pumps-&-irrigation On the backside are portsNordic Pure MERV 13 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 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200