11_1/2x11_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Air Purification These shoe covers help protect

These shoe covers help protect against heat stress

and will notify you when service is required

reliability

Increased application timing window

A max airflow rating of 200 CFM will provide sufficient cooling to server

11_1/2x11_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Air Purification These shoe covers help protectNordic 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