13_1/4x13_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Synthetic Pro Edition square wave technology provides much

square wave technology provides much greater current stability and consistency in output levels

light weight back pack is fully air tight and water proof ensuring your goods are kept dry and safe from the elements

15 amps on 120V)

UL approved

13_1/4x13_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Synthetic Pro Edition square wave technology provides muchNordic 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