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3150 Rectangular Damper

Starting at 118.64 Plus Free Shipping!

(Continental U.S.)


3150 Series Rectangular Mechanical Dampers

OEM quality damper is sold nationwide under a major HVAC manufacturer's name and is our most popular rectangular damper. Used for zone control systems or slave zones into unoccupied areas, these dampers are all 24vac driven and can be connected directly to a thermostat for simple control of any room or office. Also works with any zone control

system using a 2 position, 24vac damper. Constructed of all aluminum and stainless steel parts for long corrosion free operation, these dampers are tested to the industry standard 250,000 cycles of operation, and carry a one year guarantee. All damper blades ride in nylon bushings, for rattle free operation, unlike some other brands, and are made in the USA using

the industry proven Hansen “Synchron” motor, with a current industry leading low replacement cost of just $55-compare that to other brands!

*Ships in 48 hours

*Odd sizes available in 1 inch increments.

*Side or Bottom mount motors at no extra charge.

*24volts AC (110volts available, $11 additional charge),

*compatible with almost all brands of zone controllers.

(for use with zone controllers, order in Normally open mode)

*Compatible with direct to thermostat operation (order as normally


*undersized 1/8 inch in both dimensions to easily insert into duct.

*Requires a 2.5 to 3 inch slot in side of duct to install, motor faceplate is 5

inches wide.

*15 second or less actuation time on standard motor.

*Precision aluminum blades.

*2 wire operation on standard unit, see our other series for 3 wire, power

open/power close commercial grade motor. Also see our commercial

spring return series for Heavy duty applications.

*Standard damper rated to 1 inch pressure (great for all residential and

most light commercial, consult factory for higher pressure ratings.)

*Requires a 2.5 to 3 inch slot in side of duct to install, motor faceplate is 5

inches wide.

*15 second or less actuation time on standard motor.

* Long term integrity: A 20 year proven design with low cost replacement

motors, springs, and other parts available at reasonable prices-not so with

most other dampers.


Body width: 2.25 inches

Construction: All aluminum and stainless steel.

Mounting plate width: 5 inches

Motor Height: 2 tall, 2.5 inches wide, 4.25 inches wide.

These are top quality dampers that are being sold factory direct, and the

only thing these dampers are missing are the several levels of price markup

that is usually present on this type of damper.

Qualified technical assistance is a hallmark of our service, so please e-mail

with any questions. If you are building a new home, trying to solve comfort

problems, or energy problems, air control dampers can be a great solution!

Existing duct systems, these dampers work great! Any of our Robert

Shaw Series Backlit thermostats are certified to directly operate these

dampers, as well as any of our 24 vac transformers.

If you need multiple dampers per zone, check out our retrofit

Flexdampers(tm) at “Dampers Direct”. Zoning control and air control

become feasible even when you need 10 or 20 dampers in a duct system.

Fast Track Service: most dampers, including "option 1" on odd sizes, ship

within 48 hours.

Steps to ordering: Rectangular 2 wire Dampers:

1. Size: Choose any size above; Standard sizes shown ship in 48 hours.

All dampers are slightly undersized 1/8 inch in both dimensions to slip

into an existing duct. Add foam weather stripping to outside of housing to

take up any extra space and get a tight fit. A slightly undersized damper

works great, but too large can be a problem.

2. Choose Motor Configuration: “Power Open / Spring Close” OR

"Power Close / Spring Open": Specify what you want this spring return

damper to do when power is removed, either open or close. Tip: If you are

hooking this damper to a simple thermostat for direct control, order

“Power Open / Spring Close”. If used in a zone control system, order

“Power Close / Spring Open”.

3. Which side do you want the motor mounted on? Standard and most

common is a side (short side of the damper) mounted motor, but you can

also have the motor placed on the long side, or bottom, of damper, at no

extra charge.

4. Choose motor voltage: Our standard dampers are 24 volts AC, which is

the standard voltage in the HVAC industry, however 110 volts AC is also

available for an additional charge of $11.

5. How to order: Just buy a damper(s) in the above size range you need,

If you need special sizes or options, don’t hesitate to call. When in doubt,

just call us at 972-633-8104 and we will answer any questions you have!

Due to the large number of sizes and configurations available, these

dampers are returnable only subject to a 25% restocking fee. Ask

questions and measure your duct carefully and ensure you order the

correct size. Each damper is made to your specifications

Application: Use on any system up to .5 static pressure

3150 Small Rectangular Damper

6x6 $118.64
8x6 $122.27
10x6 $122.27
12x6 $125.91
14x6 $127.73
16x6 $129.55
18x6 $133.18
8x8  $124.09
10x8 $127.73
12x8 $129.55
14x8 $133.18
10x10 $129.55
12x10 $136.82
12x12 $138.64
3150 Medium Rectangular Damper
20x6 $137
22x6 $138.82
16x8 $138.82
18x8 $140.64
20x8 $144.27
22x8 $147.91
24x8 $149.73
14x10 $140.64
16x10 $146.09
18x10 $147.91
20x10 $151.55
14x12 $147.91
16x12 $151.55
18x12 $155.18
14x14 $151.55
16x14  $155.18
18x14 $160.64
3150 Large Rectangular Damper

24x6 $142.64
22x10 $155.36
24x10 $159.00
20x12 $160.82
22x12 $162.64
24x12 $168.09
20x14 $166.27
22x14 $169.91
24x14 $177.18

3150S Small Rectangular Damper

3150M Medium Rectangular Damper

3150L Large Rectangular Damper


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