11 1/4x19 1/4x1 Exact MERV 7 AC Furnace Filters 12 Pack Electrical Components these lenses are decentered (asymmetrical)

these lenses are decentered (asymmetrical) to eliminate distortion that would otherwise occur with a curved lens

and variable wattage output that offers several choices on a range from 600W to 1150W using 1000W DE lamps

heat lamps

It comes with a water detector WD-1 for leaking alert and watering confirmation

11 1/4x19 1/4x1 Exact MERV 7 AC Furnace Filters 12 Pack Electrical Components these lenses are decentered (asymmetrical)Nordic 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