13x21_3/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack aaron As important as it is

As important as it is to recycle all those used delivery boxes and water bottles

Made from high quality materials

Stem Mildew

In between uses

Growers have reported high temperatures in black tubing

13x21_3/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack aaron As important as it isNordic 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