Barometric Damper

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That is not a baro damper. That is a damper meant to close of a flue on a fossil fuel unit when its not firing. Keep the heat from going up the chimney.
 
Huffdawg, could you or anyone think of a way one of these devices could be utilized with a standard gas or propane fired dhw tank? I've always been bothered by the water heater's open flue siphoning our homes heated air to the outdoors. I can't figure how you'd provide a signal from a standard dhw heater to the damper to open or close. Interesting device. Thanks for providing a link to it.

Mile
 
Huffdawg, could you or anyone think of a way one of these devices could be utilized with a standard gas or propane fired dhw tank? I've always been bothered by the water heater's open flue siphoning our homes heated air to the outdoors. I can't figure how you'd provide a signal from a standard dhw heater to the damper to open or close. Interesting device. Thanks for providing a link to it.

Mile
 
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The flue of your h2o heater should be an open 1, so no need.
 
I think you could certainly use one on any oil-fired how water heater such as a Bock. When there is a call for the burner to fire the damper breaks the call, so it can open, when the end switch in the damper has proven it's open, then it lets the burner fire as normal.

They are not air-tight so any gasser which is not natural draft would likely leak smoke/flyash to the boiler room. That said, if you are thinking of using one of these on a wood boiler, the flue temps may be too high, only for fossil fuelled units. Would stop a lot of standby losses up the flue from a hot oil/gas boiler which are significant.

Motorized dampers are standard equipment on atmospheric gas equipment in order to pass minimum energy efficiency standards.

Hope that makes sense.

TS
 
I thought about a motorized damper, but when my boiler is "off," there is very little air drawn through the boiler to the flue, so little that in a power failure the fire rapidily dies down. Like Hansson, I too have an air intake control: a linear actuator on a sliding window in my shop that opens the window 6" when the boiler is on and shuts the window when the boiler is off.
 
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