21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack HPS miticide and fungicide that controls

miticide and fungicide that controls numerous diseases as well as insects and mites

SPHINX was designed for licensed producers (cultivators) to address the unique air quality needs of the grow market

Half-Note / Double-Note / Chain-Note Detection

You can count on the secure safety nylon lock system

Irrigation Injector (1:100 ratio): 10–18 fl

21x27x1 Trane Replacement MERV 13 Plus Carbon AC Furnace Filters 6 Pack HPS miticide and fungicide that controlsNordic Pure Trane Replacement 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