Menu
Sale!

Motorized HVAC Damper – Normally Closed

Rated 4.63 out of 5 based on 19 customer ratings
(19 customer reviews)

$139.96$203.96

  • Quality constructed in 28 gauge Galvanized steel
  • Comes in a range of diameters: 4 inch, 5 inch, 6 inch, 7 inch, 8 inch, 10 inch, 12 inch, and 14 inch
  • Made with 24 volt or 120 volt motors
  • End switches are available with all models

Download the Product Specs .PDF

Description

The FAMCO ADC Motorized HVAC Damper - Normally Closed is normally closed with a power open and spring return motor assembly. The ADC is made with 24 volt or 120 volt motors. End switches are available with all models. End switches allow another appliance to be operated when the damper has reached its full power (either open or closed). The floating motor mount assures proper alignment of motor, shaft and damper to prevent binding, while the clutch/coupler reduces the number of moving parts for greater service life. All units without the end switch come with a flow control adjustment so that the damper blade can be blocked from opening or closing 100%. (Note: the end switch will not work if the flow control adjustment is preventing the damper from reaching it's full potential.) This product is not rated for use in dryer ventilation, as it could trap lint and pose a fire risk. Quality constructed in 28 gauge galvanized steel. The FAMCO ADC Motorized HVAC Dampers come in a range of diameters: 4 inch, 5 inch, 6 inch, 7 inch, 8 inch, 10 inch, 12 inch, and 14 inch. The FAMCO ADC Motorized HVAC Damper is manufactured by FAMCO in the United States and comes with a 1-year warranty against product defects and workmanship. If you have any questions about this product, please refer to the FAQs above or feel free to contact us.

Watch the product video on YouTube.


PDF Download

Download the ADC product PDF.
Motorized Damper Technical Data (2024)

Spec Sheet

Questions and answers of the customers

    What's the current draw of the ADC8120?
  1. Q What's the current draw of the ADC8120? answer now
    Asked on May 19, 2021 6:45 am
    A

    All of our 120v motors will have a power draw of 0.08 current amps, while our 24v motors will be 0.36 current amps.

  2. What is the current draw on ADC424?
  3. Q What is the current draw on ADC424? answer now
    Asked on February 16, 2021 5:26 pm
    A

    The current draw on our 24 volt motors is 0.36 amps. 

  4. What is the Max CFM that the damper can hold back ( I'm looking at a 10" normally closed , power open )
  5. Q What is the Max CFM that the damper can hold back ( I'm looking at a 10" normally closed , power ...... Read more answer now
    Asked on January 22, 2021 7:39 pm
    A

    We do not have CFM ratings data for this product at this time.

  6. Is there a inner flange to support the foam seal or is the inside of the pipe basically smooth except for the shaft penetrations and swages on the ends?
  7. Q Is there a inner flange to support the foam seal or is the inside of the pipe basically smooth ex...... Read more answer now
    Asked on December 23, 2020 8:23 am
    A

    No, there is no flange, the foam gasket is adhered directly to the inside walls of the tube.

  8. What is meant by "End Switch"?
  9. Q What is meant by "End Switch"? answer now
    Asked on November 30, 2020 12:06 pm
    A

    Our end switch is a physical limit switch built into the bracket that will only activate when the damper is in the fully powered position - this switch has lead wires for connecting to an additional appliance, like an inline fan, that you would only want to power on after the damper is fully powered.

    A how do you wire the ADC624ES 24 V WITH END SWITCH
  10. How do I specify Normally Closed on my order?
  11. Q How do I specify Normally Closed on my order? answer now
    Asked on November 30, 2020 12:05 pm
    A

    We have separate product pages for our normally open and normally closed dampers, so if the product description on the page says "normally closed", then you are ordering the correct damper.

19 reviews for Motorized HVAC Damper – Normally Closed

4.6
Based on 19 reviews
5 star
68
68%
4 star
26
26%
3 star
5
5%
2 star
0%
1 star
0%
  1. Rated 4 out of 5

    Ed

    Good product

    Pros: Heavy gauge metal, good seal, good value, and the reason I bought these is the included end switch.

    Cons: I realized that an enclosed junction box is not required with 24 volts, but I would prefer to see a junction box and a conduit knock-out for a cable grip.

    I have not yet installed these, will update review after they are put into service.

  2. Rated 5 out of 5

    Wood burner

    Works great

    Works great

  3. Rated 5 out of 5

    Jeff Van Kirk

    worked great

    just what we needed

  4. Rated 5 out of 5

    Terrance KAMINSKI (verified owner)

  5. Rated 5 out of 5

    Joseph Smail (verified owner)

    reasonably priced with a quick turnaround, Quality workmanship!

  6. Rated 4 out of 5

    Paul (verified owner)

  7. Rated 5 out of 5

    Anonymous (verified owner)

    Great customer service

  8. Rated 5 out of 5

    Anonymous (verified owner)

    Very fast service, excellent robust product. Good packaging, never anything damaged in shipment. Thanks!

  9. Rated 5 out of 5

    Anonymous (verified owner)

    Well made and solid. Nice to get something made in North America.

  10. Rated 5 out of 5

    Anonymous (verified owner)

    I have not installed this damper yet, but the quality looks really good.

  11. Rated 4 out of 5

    Gary Booth (verified owner)

    just took a bit longer than i thought.

  12. Rated 4 out of 5

    Charles Gully (verified owner)

  13. Rated 5 out of 5

    Anonymous (verified owner)

    Great product! Nice quality construction.

  14. Rated 5 out of 5

    Thomas D. (verified owner)

  15. Rated 5 out of 5

    Anonymous (verified owner)

  16. Rated 3 out of 5

    Rick L. (verified owner)

    A little pricey but high quality as always, I’m a returning customer & 43 years in the HVAC & R industry.

  17. Rated 5 out of 5

    Aaron (verified owner)

  18. Rated 4 out of 5

    Joe (verified owner)

    Difficult to attach to my vent pipe. Little to small to fit over the female end and to big for the male end. I had to drill out rivets for the female end and add a sleeve for the male end. Something other than just loose wires on the 24VAC model would be nice as well. In the end it worked.

  19. Rated 5 out of 5

    Anonymous (verified owner)

Add a review

Your email address will not be published. Required fields are marked *

Bulk Discounts + Free Shipping = Pro's Advantage | Learn More
Bulk Discounts + Free Shipping = Pro's Advantage
Learn More