17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Extension and dry particulates in non-hazardous

and dry particulates in non-hazardous environments

a lamp extension cord is required

the trademarked phosphorus booster used in Oneness makes photosynthesis in your plants function optimally

These bacteria can live in both aerobic and anaerobic environments

Food to keep the microbial populations thriving

17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Extension and dry particulates in non-hazardousNordic 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