16_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack LUXX Bar It is also wider

It is also wider

and Italian-made

Nordic Pure 16x20x4 Pleated Air Filters MERV 8 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home

pH+ main ingredients are Potassium Carbonate and Potassium Hydroxide

- Better Nitrogen Usage – The technology put into the organic acids in this formulation make them better able to uptake and use nitrogen

16_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack LUXX Bar It is also widerNordic Pure Custom MERV 10 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