Air Box Jr. Exhaust Filter (COCO) spl_hlg It will not affect overall

It will not affect overall air flow

Flashing high/low alarm with control lockouts to protect from over-dosing

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Superior grid pattern design and multi-level drainage channels to promote fast and thorough drainage

Simple 1 button calibration for pH 7 and pH 4

Air Box Jr. Exhaust Filter (COCO) spl_hlg It will not affect overallDon't let unwanted air pollutents get in your grow room! Eliminates 98% of all insects, molds, mildews, spores, pollen, dust, dander and other airborne particles down to 0. 3 microns using the MERV 13 filter. Keeps glass lenses dust and bug free. Replaceable, economic, disposable filters. Accepts standard 10'' duct. Use the charcoal filter on exhaust ducts. Adaptable to any duct filtering system. Easy to install, easy to use, easy to maintain.