8_1/2x30x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack hawthorne The temperature coefficient is fixed

The temperature coefficient is fixed at 2%/°C

The wand's lightweight aluminum construction allows for reinforced walls

- 8 sizes from 33-150cm

5 tbsp/gallon

Precisely control photon output when paired with Autopilot PX series controller (PX2 and above)

8_1/2x30x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack hawthorne The temperature coefficient is fixedNordic Pure Custom MERV 14 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