18x27x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Nutrients 5:1 - For carpet and

5:1 - For carpet and fabric sanitation

ammonia and sulfrous acid

PrSpec: 200 μmol/s

Mycorrhiza is a powerful root enhancer that occurs naturally in forest soils where the humus content is high and the soil is thriving with microbial life

The only difference between the two is the motor output

18x27x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Nutrients 5:1 - For carpet andNordic 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