23_3/4x23_3/4x1Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack ac-dehumidification-humidification Made from botanically-derived active ingredient

Made from botanically-derived active ingredient Pyrethrin

Place the Square Flood and Drip Shield on top of your 6'' rockwool cube and use the built in measuring table to fill the reservoir with water and nutrients

Maximum of 1 hour REI when applied in enclosed environments

Minimum Order Quantity is of 3 pieces

23_3/4x23_3/4x1Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack ac-dehumidification-humidification Made from botanically-derived active ingredientNordic Pure Custom MERV 7 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