Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan water-filtration - Automatic air pressure compensation

- Automatic air pressure compensation valve

Silicon is the second most abundant element in plants and with out it they can not survive

RAW = SOLUBLE FULLY LOADED RETAIL DISPLAY

A built-in photocell on the sensor will deactivate CO2 injection during the controller’s night mode

The DEEP BREATH/G10 combo boosts yields to unheard of levels

Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan water-filtration - Automatic air pressure compensationA duct muffler designed for use with inline fans in grow tents, bathroom fans and other HVAC applications. Features dual aluminum flanges to help absorb sound waves from fan vibrations and airflow. High quality neoprene foam in an egg crate pattern that will reduce fan noise by up to 50%. Galvanized steel body that is corrosion resistant and can withstand extreme temperatures. Duct Opening Diameter: 4 inches Length: 15 inches Weight: 2. 30 pounds