17_1/4x23_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_ps 8 Compressed Organic Coir Sheets

8 Compressed Organic Coir Sheets wrapped

20 (19-20 mil) virgin styrene for a durable

compared to hand trimming

Growers enjoy long-term reliability and peace of mind with ILUMINARs 5-Year warranty and IP66 rating for use in wet environments

17_1/4x23_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_ps 8 Compressed Organic Coir SheetsNordic 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