20_1/2x25_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack plant-support • Essential elements are not

• Essential elements are not derived from harmful chemicals such as urea and ammonia nitrate

Features PWM-controlled stator blade fans that are designed for high static pressure applications such as ducting

"I was skeptical about the internal pump but it works perfectly

This concentrated organic spray works within hours of application and does not migrate through soil

Specifics:

20_1/2x25_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack plant-support • Essential elements are notNordic 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