7" Retrofit Round Damper Zoom

7" Retrofit Round Damper


Brand: Honeywell

Qty Price
/ each
$419.75 / box (5 units x $83.95)
In Stock! Ships in 24-48 Hours
(8 Available)



Size: 7"
Application: Air Quality
Motor: Power Close
Power Open
Motor Mount: Direct Connection to Damper Shaft
Motor Timing: 90 Seconds
Shape: Round
Wires to Motor: 3

Description for Honeywell RRD7

Product Overview:

  • The RRD is a round damper that is easily inserted into rigid round ducts for retrofit zoning in forced air heating and cooling systems. It is available in four sizes for use in 5 in., 6 in., 7 in., and 8 in. ducts. The damper is used with Honeywell HZ221, HZ311, HZ322, HZ432 and similar zone control systems. The power open, power closed actuator draws 2.5 VA allowing multiple dampers per zone, but delivers high torque for reliable operation.

Product Features:
  • Easy slide-in installation
  • 2.5 VA allows for many dampers on one zone
  • Available in 4 sizes to fit most rigid round branch ducts
  • Quiet, long life motor automatically shuts itself off in full open and closed positions
  • Gaskets around blade and under motor housing for low internal leakage and very low external leakage
  • Range stops with easy adjustment from top of motor
  • Easy to see and reliable mechanical blade position indicator
  • Easy to hook up with conventional thermostat wire
  • Simple manual blade positioning with push button gear release

Product Specifications:
  • Description: Retrofit Round Damper
  • Application: Zone Damper
  • Shape: Round
  • Motor Mount: Direct connection to damper shaft
  • Motor Type: Power open/Power close
  • Motor Timing: 90 seconds
  • Wires to Motor: 3
  • Other Motor Information: Range stops
  • Voltage: 24V
  • Size (in.): 7 in.

7" Retrofit Round Damper


by PowerReviews
Honeywell6" Retrofit Round Damper

(based on 4 reviews)

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Reviewed by 4 customers

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Honeywell round damper

By Carl

from SE PA

Verified Buyer

Comments about 6" Retrofit Round Damper:

This devise used in duct work to help regulate multi zone heating and air. They work well, but since they open and close many times per day...often per hour, they wear out in 2 to 5 years. If you have a number installed..could be from half a dozen to 12+. at @$100 each the homeowner will find themselves facing a hefty bill every few years. Local distributor, Supply House service and delivery is superb!


They work, but for how long?

By Dave

from Newport, KY

Verified Buyer

Comments about 7" Retrofit Round Damper:

They install easily, are made of solid materials except for the motors themselves. The motors are plastic and when operating you can tell they have cheap plastic internal parts. Supposedly they'll last up to 100,000 cycles, hopefully that's true. The ones I received were different than what is pictured. They've updated the black motors to a light gray model.

(1 of 1 customers found this review helpful)


Nearly all defective after 3 years

By Ripped Off

from St. Louis, MO

Verified Reviewer

Comments about 6" Retrofit Round Damper:

We have seen an almost universal failure rate of these dampers within 3 years. When opening one of the defective units, the gears in the motor are plastic and were worn out. The installation was done correctly without any rubbing or interruption, so there is no reason that the units should go bad within 3 years. This is a total piece of junk.

(0 of 1 customers found this review helpful)


Retrofit Damper

By Dave

from Townsend, MA

Verified Buyer

Comments about 6" Retrofit Round Damper:

I purchase 4 RRD6 to be used in converting a 1950 single zone forced hot system into multiple zones. The RRD6 worked very well in this application due to the limited space to access the old duct work.

The 1950 vintage pipe was a pretty heavy gauge and the RRD6 mounted firmly. I might be a little concerned with newer lighter gauge materials

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