Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

Replaced a broken damper above my cooktop. This one works better, the springs keep the damper closed so wind doesn't blow down into my kitchen from the vent shaft above.

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

The spring that returns the flaps back to the closed position need to be stronger. Other than that it works great.

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

fine

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

Great value. Works just as expected.

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

I inserted the 8" backdraft damper into my kitchen exhaust fan duct leading to the outside because the original damper was missing and replacement parts for it could not be found. The design of the Fantech RSK8 spring-loaded backdraft damper was effective and kept the outside air from coming into the kitchen through the duct.

My only complaint with the product is the weakness of the spring that is built into the product. The slightest change in position of the center rod that holds the two blades together offered enough resistance to keep the blades from closing securely. I corrected the problem myself by stretching an additional spring across the diameter of the blades and attaching the ends of the spring at 9 o'clock and 3 o'clock.

The bottom line is that I would recommend this product to a friend because apart from its weakness (which I can correct) it works effectively and efficiently. I would have given this product a better rating if it had come with a more powerful spring.

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

Used to prevent back draft into ductwork lines when air supply is down. (Keeps smoke from entering ductwork during a fire when the Air Handling Units shut down.)

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

Needed this from a local supplier and they had to special order. [...]Thanks.

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

This product is being used as a 'diode' to prevent air from a common exhaust duct from entering spaces where it does not belong. I was designing one and saw this in the catalog, and it was exactly what I had sketched. Theirs was better - I didn't have to make it! Perfect fit in the ductwork, perfect rubber seal on the butterfly flaps. Caveat - install it LEVEL with the flap hinge pointing up. Unless you have air pressure to spare. It will tolerate a small angle from vertical, but too much may cause the flaps to hang.

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

If you are going to use an inline fan then you must use this to eliminate drafts coming back thru the fan. It works perfect

Comments about Fantech RSK8 Spring Loaded Backdraft Damper for 8" Duct:

I will be using this in the attic with a Fantech FG8XL for stove top exhaust ventilation. Tried in on the fan before installation. It's heavy duty, good rubber seal, smooth operation. The thin light weight improvement store components can't even compare.