13_1/4x13_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Water distribution is more uniform

Water distribution is more uniform throughout the entire block which is the basis for a well-defined root system with higher capacities for water and nutrient uptake to produce robust and vigorous crops

- Durable ceramic coating

the tech specs are just the start

This product is NOT UL listed and not certified to meet OSHA requirements

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13_1/4x13_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Water distribution is more uniformNordic 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