17_1/2x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack AIR FILTER BOXES once ingested by the wayward

once ingested by the wayward caterpillar or worm

Universal Inline Design – Connects directly to any standard garden hose or irrigation line — no tools required

provides a much faster transition to your desired room  temperature

Duramax 200 is a cost-effective and manageable solution for greenhouse growing that will last for years to come

17_1/2x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack AIR FILTER BOXES once ingested by the waywardNordic Pure Custom MERV 8 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