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without harmful side effects
maintaining a precise 62% RH target throughout the pack's active life
Elite 91 SILICIC ACID contains one of the most powerful
mineral and mycorrhizae blend in it
17x27x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack pump without harmful side effectsNordic Pure Custom MERV 8 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