9x27x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_hrg EC or TDS levels rise

EC or TDS levels rise either above or Below (user selected) that set-point

Small T5 tubes create BIG OUTPUT

Strong motor creates an ultra-fine Mist/fog

Reduces air flow noise

Easy Refill

9x27x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_hrg EC or TDS levels riseNordic Pure Custom MERV 7 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