23_3/4x23_3/4x1Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack rock-bottom · Safety Adjustable Flame

· Safety Adjustable Flame

– Light output PPF 1700 μmol/s

The secret is in the Zenport specially designed articulating four-bar compound linkage

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This model is equipped with a grounding bar to ensure highly accurate pH readings and longer electrode life

23_3/4x23_3/4x1Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack rock-bottom · Safety Adjustable FlameNordic Pure Custom MERV 12 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