Ed wrote:I have an Alaska Stoker, I would like to run a pipe into my return of my hot air furnace (already done) and be able to use the fan in the hot air furnace to circulate the air. My question is, how do I make the thermostat run the fan and not fire the gas furnace. Is it possible to have it do this and when the coal doesn't meet the demand of the thermostat the gas will fire as the backup source of heat. Is it possible or am I dreaming.
I have a simple solution, I am doing exacly what you want to do. Install a Honeywell Vision Pro 8000 touchscreen thermostat for your gas furnace. It has a feature that lets you set the fan to "Off,Automatic or Recirculate". In the recirculate mode, the fan runs randomly for 5-10 minutes and the turns off for 5-10 minutes.
I ran a 6" duct from my Alaska stove into my cold air return so it has to pass through my furnace filter.
The coal stove keeps my house at 72-75 degrees, I set my gas furnace at 68 degrees in case the stove goes out. If the gas furnace kicks on the fan limit switch will over ride the recirculate feature and run the fan as it normally would.
So far the furnace has not come on at all.
I am working on an improved heat exchanger, I also bought a Digital camera so I will be able to post pictures soon(the heat exchanger will be easier than figuring out this camera)
I am heating an 75 year old Story and a half about 1500 square feet, I have added in line duct fans to improve air flow up stairs.
Hope this helps