Thermo-Mechanical Damper

Badger Freezer · Post by **Badger Freezer** » Sat. Feb. 28, 2015 11:12 am

BS or Questionable BS....Has anyone ever produced a thermo-mechanical(not electric) damper for the flue? Similar to a heat riser on a car but, closes with heat build-up and helps retain heat and suppress the fire. It will take a smaller thickness of coil spring and a smaller counterweight. But is it feasible? Could a similar piece of equipment be made for air intake?(using an air foil sensor?) Could it be balanced to give optimally efficient fire? Hey! They make fans that make electricity from heat...why not?
Let's give it to Mikey...he'll build it...he builds everything!
I have electric versions on the boilers at work.

freetown fred · Post by **freetown fred** » Sat. Feb. 28, 2015 12:19 pm

HITZER sells the whole kit.

McGiever · Post by **McGiever** » Sat. Feb. 28, 2015 2:50 pm

freetown fred wrote:HITZER sells the whole kit.

Do a "Search" on bimetallic damper

Those come stock on many stoves since back as early as the 1970's...maybe earlier.

Not on the flue outlet, but on the inlet air...works just as well, "what can't get in...can't get out".

scalabro · Post by **scalabro** » Sat. Feb. 28, 2015 3:03 pm

Badger Freezer wrote:BS or Questionable BS....Has anyone ever produced a thermo-mechanical(not electric) damper for the flue? Similar to a heat riser on a car but, closes with heat build-up and helps retain heat and suppress the fire. It will take a smaller thickness of coil spring and a smaller counterweight. But is it feasible? Could a similar piece of equipment be made for air intake?(using an air foil sensor?) Could it be balanced to give optimally efficient fire? Hey! They make fans that make electricity from heat...why not?
Let's give it to Mikey...he'll build it...he builds everything!
I have electric versions on the boilers at work.

AFAIK there is no "Automatic Pipe Damper" for the exhaust gas path. However, something similar (Uh Oh

) is manufactured that Almost (Uh Oh

) does what you are looking to do. It's called a barometric damper.

There is a famous thread on it here.......

freetown fred · Post by **freetown fred** » Sat. Feb. 28, 2015 3:05 pm

I did not know a baro was heat activated?

Post by **coaledsweat** » Sat. Feb. 28, 2015 3:17 pm

I believe what the OP is referring to would be called a stack damper, which serves a different purpose than a barometric damper.

McGiever · Post by **McGiever** » Sat. Feb. 28, 2015 3:18 pm

Boilers at his work are Not solid fuel.

Gas and oil stop producing heat as soon as the controls signal it to stop...Not So with solid fuels.

Blocking off a the breech of a solid fuel appliance will get you a whole lot of Carbon Monoxide in a hurry.

scalabro · Post by **scalabro** » Sat. Feb. 28, 2015 3:20 pm

Is this not the hand fired section?

scalabro · Post by **scalabro** » Sat. Feb. 28, 2015 3:23 pm

freetown fred wrote:I did not know a baro was heat activated?

I'm not taking the bait!

McGiever · Post by **McGiever** » Sat. Feb. 28, 2015 3:41 pm

scalabro wrote:Is this not the hand fired section?

Sure is.

I have electric versions on the boilers at work.

Just because the boilers at work can, doesn't make it possible here.

Principals of solid fuel fires don't know the boundaries of "only Boilers"

McGiever wrote:Boilers at his work are Not solid fuel.

Gas and oil stop producing heat as soon as the controls signal it to stop...Not So with solid fuels.

Blocking off a the breech of a solid fuel appliance will get you a whole lot of Carbon Monoxide in a hurry.

Badger Freezer · Post by **Badger Freezer** » Sun. Mar. 01, 2015 7:05 am

I wasn't trying to reinvent the wheel. I only asked if it were ever done. I have my answer. End of my inquiry.
Thanks everyone for your input.
It's good to know there are caring people out there, concerned with the welfare of everyone, when it comes to the safe operation of a coal stove.
I really like this forum.

freetown fred · Post by **freetown fred** » Sun. Mar. 01, 2015 7:30 am

CRAP!! I tried Scott.

scalabro wrote:
freetown fred wrote:I did not know a baro was heat activated?
I'm not taking the bait!