15x9x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack lighting_accessories 250 Mini Blocks (AKA 150

250 Mini Blocks (AKA 150 strips)

It auto-calibrates on startup

accurate and portable

Plug refills available to ensure you never have to buy more equipment

15x9x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack lighting_accessories 250 Mini Blocks (AKA 150Nordic 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