12_3/4x20_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack cleanroom Activated by humidity (35%) and

Activated by humidity (35%) and /or by lightly misting with water or

• Increases insect and fungi resistance

Apply weekly and on the same day and time each week

1 GPH Short Rocket Dripper

Listed diameter is measured from the inside of the bottom of the saucer

12_3/4x20_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack cleanroom Activated by humidity (35%) andNordic Pure Custom MERV 13 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