Twister Ventilation Fan c_Hydroponic Supplements & Hormones Normally there are approximately 300

Normally there are approximately 300 parts per million (PPM) of CO2 in the atmosphere

Energy Saving (1) 3' wide x 6' 8" tall single Plyco Door Exhaust Fans These slant wall fans offer high CFM capacity and low energy costs

All items must be hardwired to an existing power source

12 1/2" x 8" 2

The trays are strong with reinforced sides and lips

Twister Ventilation Fan c_Hydroponic Supplements & Hormones Normally there are approximately 300This medium volume exhaust fan will distribute fresh air and provide cooling for almost any commercial, industrial or agricultural application. Perfect for Hog and Poultry barns or small greenhouses. Thermally protected, totally enclosed motor comes with a two year warranty and heavy 18 gauge housing will hold up for years to come. Unique butterfly style shutter opens up fully for maximum CFM output while providing easy access for cleaning. Optional