Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct

Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct

About This Product

MFG: Fantech
MFG#: RSK4
Our#: 112094

Gravity backdraft damper with galvanized steel collar and lightweight aluminum damper blades. Spring loaded for assistance in gravity closure. For optimum performance, damper should be installed in a vertical orientation. For dampers installed in a horizontal position, the hinge should be vertical

Fits 4" Round Duct

A=4
B=3 1/4"

duct connections are 1/8" smaller than duct size
 

 

 

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BathroomFanExperts.com Price:

$13.99

(Regular Price $21.00, You Save $7.01)
Availability: In Stock

REVIEW SNAPSHOT®

by PowerReviews
Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct
 
4.4

(based on 16 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to install (13)
  • Quiet (7)

Cons

    Best Uses

        • Reviewer Profile:
        • Homeowner (15), Avid do-it-yourselfer (8)

      Reviewed by 16 customers

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      Displaying reviews 1-10

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      5.0

      I would buy this product again

      By Jim

      from PHILA

      About Me Handyman, Homeowner

      Verified Buyer

      Pros

      • Easy To Install
      • Quiet

      Cons

        Best Uses

          Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

          I purchased a remote mounted Fantech fan with a grill housing with an integrated plastic backdraft damper. The plastic backdraft damper was very noisy when it was windy. I ordered this spring loaded backdraft damper, removed the plastic backdraft damper and installed the new one. This one is very quiet and does the job. I wish this was recommended with the grill housing, it would have saved extra work.

           
          5.0

          A ggod product that works.

          By Ron

          from Portsmouth, Ohio

          About Me Homeowner

          Verified Buyer

          Pros

          • Easy To Install
          • Quiet

          Cons

          • Energy Inefficient

          Best Uses

          • Basements
          • Kitchens
          • Large Rooms
          • Smaller Rooms

          Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

          A Light weight product that works well.

           
          4.0

          Good Function, Needs Extra Effort to Fit

          By Glen

          from Akron, Ohio

          About Me Homeowner

          Verified Buyer

          Pros

            Cons

              Best Uses

                Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                Used to control two bathroom exhausts to a common flue. Vanes are aluminum and will not rust. Small spring (hopefully SS) provides light pushback (would still recommend mounting as vertical as possible). Opens nicely with pressure. Only issue is slip fit to mating ducting is very short, perhaps 1/4" to 3/8" before an internally protruding rolled stiffening rib is hit. Had to use three self-tapping screws to hold it in place (then tape) and fit it to the ducts on a bench rather than in-place. Had they rolled the stiffening ring going out rather than in, it would have had easily 1" or more of mating slip. Once in, very satisified.

                 
                4.0

                Works well

                By Detail Guy

                from Portland, OR

                About Me Handyman

                Verified Buyer

                Pros

                • Quiet
                • Well built

                Cons

                  Best Uses

                    Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                    I was concerned about buying sight unseen... no problem... it's good quality.

                     
                    4.0

                    Good Product

                    By crocketd

                    from Woodstock, VT

                    About Me Handyman, Homeowner

                    Verified Buyer

                    Pros

                    • Easy To Install
                    • Well made

                    Cons

                      Best Uses

                      • Exhaust fan ductwork

                      Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                      simple design and well made so it should last a long time.

                       
                      5.0

                      Easy to install damper

                      By Shetley

                      from Long Island , NY

                      About Me Handyman, Homeowner

                      Verified Buyer

                      Pros

                      • Easy To Install
                      • Quiet

                      Cons

                        Best Uses

                          Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                          Easy to install

                           
                          4.0

                          Worked as advertised

                          By Drafty Dog

                          from Denver CO

                          About Me CONTRACTOR, Handyman, Homeowner

                          Verified Buyer

                          Pros

                          • Quiet

                          Cons

                          • Exit side hard to hook up

                          Best Uses

                          • Kitchens

                          Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                          My dryer was backdrafting and dropping lint all over the house when it was not running. Evidently there was a heat convection going out of the second floor somehow. The damper works real well. The outlet side has a raised hub ring about 1/2 inch from end so you can not get a standard 4 inch galvanized pipe over it far enough to stay connected. I had to beat it flat with a hammer in order to get the exhaust pipe over the unit to fit properly and then metal taped it. Other than that I would purchase again. [...]

                          (3 of 3 customers found this review helpful)

                           
                          4.0

                          Must have addition

                          By Jimmy

                          from Western NY

                          About Me Handyman, Homeowner

                          Verified Buyer

                          Pros

                          • Easy To Install
                          • Quiet

                          Cons

                            Best Uses

                              Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                              The vent enclosure has it`s own backdraft damper mounted inside the unit at the exit point. This is certainly not enough and Fantech should say so. After installation,the slightest wind outside would push the damper closed and make a noise every time. there is plenty of distance between the roof vent and the bathroom. The noise was making me crazy,so bought this backdraft damper which solved the problem right away. Mounted in the attic after the fan itself. In hindsight should have seen the need for this. No way would the damper in the bathroom work AND the cold air would still enter the bathroom. This damper stopped that also. I also bought the 6 inch damper for another bathroom.

                              (1 of 1 customers found this review helpful)

                               
                              4.0

                              Works well... I think.

                              By Todd

                              from St. Louis, MO

                              About Me Homeowner

                              Verified Buyer

                              Pros

                              • Easy To Install

                              Cons

                                Best Uses

                                • Bathroom

                                Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                                Installed two of these vertically on top of two Fantech FR100 fans used as bathroom exhaust fans. The first time I turned the first fan on and then back off, the flappers failed to close completely. They seemed to work properly on subsequent attempts, but the initial failure left me with a slight feeling of doubt. I hesitate to add any weight to the flappers for fear of reducing airflow. I suppose that a significant backdraft would force the flappers closed anyway so I'm not too worried about it. These are of much higher quality than the plastic ones you can buy at your local hardware store.

                                 
                                5.0

                                This seems to work well.

                                By Ken

                                from Katy, TX

                                About Me Homeowner

                                Verified Buyer

                                Pros

                                • Easy To Install

                                Cons

                                  Best Uses

                                    Comments about Fantech RSK4 Spring Loaded Backdraft Damper for 4" Duct:

                                    I installed this directly onto an in-line exhaust fan. As far as I can tell it is working well.

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