Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan microbial fertilizer Maximize your yield while minimizing

Maximize your yield while minimizing power consumption

In hot weather its best to spray in the morning or evening because dwell time determines effectiveness

filled with thermal insulation material

If your Ph is getting too high

Plants grown under 600W FULL NOVA appear healthier and support more flowering in an earlier period of time

Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan microbial fertilizer Maximize your yield while minimizingA 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