15_1/4x15_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_nextlight Graphite Sensor– Reduces polarization effects

Graphite Sensor– Reduces polarization effects and does not oxidize resulting in a reliable and accurate reading

Pests can’t build immunity to it

higher quality & more efficiency

or 100mg if solid

encourages rapid plant

15_1/4x15_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_nextlight Graphite Sensor– Reduces polarization effectsNordic 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