AC Infinity Backdraft Damper Ducting Insert - 8" Herbi Range this system requires no electricity

this system requires no electricity

Low initial EC – Minimal residual salts

and pistil vibrancy

Use Herbi’s BREW and your choice of high quality worm castings and/or compost for making a great compost tea

Note about these dimensions:

AC Infinity Backdraft Damper Ducting Insert - 8" Herbi Range this system requires no electricityA ventilation ducting tool designed for insertion into ducting to prevent cold drafts and debris from flowing into ventilation systems. Built to be embedded in ducts, the backdraft damper is made of sturdy galvanized steel and features two rings of outer rubber gaskets. This enables it to grip your ducting with an airtight seal in either a horizontal or vertical orientation. The butterfly damper blades are made of aluminum and are equipped with a