25x28x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack odor-control 40% ammoniacal nitrogen

40% ammoniacal nitrogen

Benefits of Blue Sticky Traps:

and plant metabolism rates are directly related to their root zones' uptake of nutrients and fertilizers

Variable Speed Control

1 × Thermometer and Hygrometer

25x28x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack odor-control 40% ammoniacal nitrogenNordic Pure Custom MERV 13 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition