23_1/4x29_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack hawthorne When the standard value is

When the standard value is recognized and stability reached

Unlike glyphosate-based products like Roundup

Aeroponic and Soil applications

This filter lasts for up to 1000 gallons before it has to be replaced

Built in mounting brackets make for easy installation

23_1/4x29_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack hawthorne When the standard value isNordic Pure Custom MERV 10 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