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and size options
a jar test is highly recommended before applying this product
The pH level should be checked daily
Rich in nitrogen and calcium
500K Lamps 240 Volt 5
17_1/8x26_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack books and size optionsNordic Pure Custom MERV 13 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
