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Durozone by Durodyne 6 inch power open, spring close, damper is easily convertible to  power close, spring open damper for direct control from a thermostat or switch, or as a fresh air damper, and can also be used for zone control systems.  This means you will not ever get stuck with the wrong configuration-Use this damper in the “normally closed” mode when connected straight to a thermostat or a switch, and later easily convert it to “normally open” if you upgrade to a zone control system.  Voltage is 24 volts AC, convenient two-wire operation, 5 Year warranty-Best in the industry!  Works with virtually any brand of zone
control system.
This is the finest quality American made damper available at an unbeatable price. Qualifies as Nafta Duty free as USA built. This damper is made in the USA, with heavy gauge steel, and anti-rattle washers,  and riveted contruction, there is no better 6 inch damper available at this price anywhere.   Durozone is one of the largest, oldest and most respected manufacturers in the USA, and you can install this damper with confidence.  And we are Damperdirect, where our only business is Dampers and Zone Control, with outstanding, on the phone tech support if you need it!
Urethane gasket seals are used to insure long term use at maximum UL rated furnace Outputs of 200F.
We are able to offer this extremely low price on this one size six inch damper, since it is used nationwide by the thousands for code-required fresh air ventilation standards, and as a result, manufacturing economies of scale allow an amazingly low price this superb damper.  Works equally well for zone control and other air control applications.
Looking at another brand of spring return damper?  Does it have these outstanding quality features?
*
Industry leading 5 year warranty, and covered by our 30 day money back satisfaction guarantee.
* Compatible with any 24vac thermostat or zone control system.
*Easily converted to in the field to “Normally Open, Power Close” (Use with Zone Control)  operation, or “Normally Closed, Power Open” (Direct to Thermostat) operation.
*Riveted can construction, better than spot welding.
*All steel gears in motor, not failure prone plastic.
*Urethane blade gaskets
*Blade pressed into damper shaft, not cheap spot welding!
*”Soft Landing” slow blade return under spring power  minimizes perceived changes in airflow noise, and  protects damper drive train.
* Outstanding long term parts supply for replacement motors.
*Full lenght, heavy gauge galvanized can with roll beads for strength and rigidity.
Specifications:
Part no. Retrozone NSPRD06
24 volts AC, about 8va power draw when energized
Power to open, automatic  spring closing when power is removed.
Motor can be easily reversed to make Power to close, spring open when power is removed.
Weight: 3.3 lbs.
Application:
The NSPRD-06FA  Damper is perfect for direct control from a thermostat or switch, since a one wire call on a thermostat’s Y or W outputs will cause the damper to open.
(If you would prefer a non spring return damper that will still operate with just one wire control from a thermostat, check out our SD super duty dampers at our store “Damperdirect” ).
On Zone control systems, you may set this damper to spring open, and power to close. This two wire damper is compatible with any 24vac zone control system.
Other notes:
Also see our other dampers in our store Damper Direct,
including out three wire models which use less power and offer greater reliability  than 2 wire spring return models-take a look at our SD series dampers with commercial Belimo motors.
Order either our 24vac plug in or hard wired transformer for power, and any of our Robertshaw RS series thermostats will control this damper.  Looking for 3 wire and commercial grade dampers?  See our store DampersDirect.