17_1/8x34_7/8x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack eligible-for-discount Our formula is chelated to

Our formula is chelated to allow for immediate availability to plants

and distributes soft heat more evenly

2 flow meters - incoming and outgoing

LED error indicators

• Canadian Sphagnum peat moss (75-85% by volume)

17_1/8x34_7/8x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack eligible-for-discount Our formula is chelated toNordic 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