17_1/4x29_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack rockwool Information on the additional included

Information on the additional included hardware can be found below

Long Battery Life - The Checker has an exceptional long battery life of approximately 1000 hours

For example

It is 100% soluble and is compatible with all growing mediums

Adding a small amount improves the utilization of standard feed mixes

17_1/4x29_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack rockwool Information on the additional includedNordic 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