Wood stove hook up to furnace


Only if the woodstove significantly overheats the room. If the return register is on the floor, then it will draw cool air and circulate it through the house. You would need a return grill at ceiling level above the woodstove, and hope that smoke leakage when the door is opened or the smell of overheated metal and burning dust does not get distributed throughout the house.

Will, If I understand your question correctly, you don't really want a free-standing wood stove.

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You want a wood-burning furnace. Many manufacturers sell them. I am going to have a fossil fuel furnace and I am going to have a woodstove for power outages and to use open like a fireplace.

I just wondered if anyone had any experience circulating heat from a woodstove with a furnace fan and ducts. Another option I'm considering is inexpensive through the wall fans. Riversong brings up some good points about air quality and the location of the return ducts. I've been using my heat-pump air handler to circulate warm air from my wood stove throughout my house for years.

How to install an exterior wood furnace

It definitely makes a difference and I recommend it. It won't equalize the heat, the living room is still much warmer than the bedrooms, but it warms the bedrooms a lot more than they would be without the blower running and it helps keep the living room from over-heating which is an issue in this well-insulated home. However, if your duct work is outside the heated envelope then you definitely don't want to do this and if you need a humidifier your house is too drafty and you need a blower door and duct blaster test.

You don't mention what climate zone or geographic area you're in. But running a woodstove open "like a fireplace" is almost not quite as inefficient as a masonry fireplace but far less efficient than an EPA certified woodstove with the door closed as intended. Many quality woodstoves have glass doors to offer the aesthetics of an open burn without the efficiency liability. Increasing the flue gas volume with open doors will also increase infiltration and contribute to dry house syndrome.

Will, the answer to your question is yes. I've done this many times and it can work fine. First, if your stove is equipped for it, you should install a direct combustion air duct. The return air intake grill to the furnace should be located at the ceiling or ridge in the room with the woodstove, and the blower in the furnace wired to a separate thermostat to turn on with a temperature rise above some temperature, say 75 degrees. This "cooling" thermostat should be located close to the ceiling, must control the blower only, and must be separate from the room heating stat.

Ducting an add on wood furnace

This will distribute the air to all zones on the supply side of the furnace, and will also filter and humidify the air to some degree. Use the best filters you can and make sure the woodstove is working properly to minimize smoke and fumes. Consider installing a smoke detector in this room and also a line voltage cooling stat at the ridge set at a high temperature to shut the furnace blower off in case of a fire.

I am involved in a Design Build project in Michigan and we are looking at incorporating this concept as part of an overall energy reduction strategy. So I thought, great, now the wood furnace will heat the whole house. The installer put in a relay that kicks on the fan to the gas furnace when the blower on my wood furnace goes on.

It's supposed to help circulate the heat. Well, I end up with lukewarm to cool air comiing out of the registers. And it takes forever to get any sort of heat built up. After doing some research, I found that the problem might be how my wood furnace is ducted into the gas furnace. Currently the output from the wood furnace is ducted directly into the plenum above the gas furnace. From what I've read, this setup doesn't work very well since the blower on the gas furnace is stronger, it tends to build slight pressure in the plenum thus not allowing all of the heat from the wood furnace to enter the plenum.

Whew, that was a lot to say. I thought I'd ask you folks before I try anything Joe. Jan 11, Messages: Remove the fan from the wood furnace and make the wood furnace kick on the gas furnace's fan. And take the hot air from the gas furnace into the cold air return of the wood, and exit the hot air from the wood into the house ducts.

There should only be ONE plenum, on the wood side. When you use your gas only, it will have to go through the wood furnace before it enters the house. So make sure its well insulated. Dean Here - read ALL of this thread, not just the start: DeanBrown3D , Feb 27, Dec 13, Messages: I had the furace place build a sheet metal box with a 14" round inlet at the bottom, goiung through a regular furnace filter.

The top of the furnace has an 18" round outlet feeding directly in to the plenum above the furnace. The cold air draws from the cold air plenum on the gas furnace. I slide a piece of sheet metal in the gas furnace filter slot so the wood furnace will pull cold air from the house, not from the gas furnace plenum. The fan and furnace run off a thermostat right next to the gas furnace thermostat upstairs.

It heats VERY well down to about 10 degrees. After 10 degrees you get up in the middle of the night to feed it. The down side to my set up is the gas furnace is off when the wood is running. Older sq foot house central Indiana. I would love to come up with a baffle system to block the air returns so the gas would automatically kick on if the wood ran out. Kerri is home during the day so it is not a huge deal to keep it running all the time. My camera is at work, otherwisw I would snap a couple of pics.

What is it that activates the dampers?

How to Connect Your Wood Stove Fan to Central Heating Ducts

My large wood furnace fan is very quiet, but I would love the ability to stoke it up at night and let it go out without waking up to 55 degrees. Feb 8, Messages: TreeCo Got a pic or 1-line description of those motorized dampers? Do they have a feedback signal to tell a controller that its working and open or closed? Apr 22, Messages: Mixing different combustors, with different air requirements, different combustion temps, etc Your home is too valuable too fool with those non-expert specialists.

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And, check with your insurance company and the local fire inspector if there's one. Our rural region has none. I hope that you're not using a shared flue for both furnaces: Free standing, no electric wood stoves.

meleforli.ga Not as effecient, but I am just looking for ideas right now, my gas furnace and ductwork are under warranty so I would have any modifications done by a contractor. I am simply trying to find a better solution to my current ducting and wondered if anybody has a setup where the wood output goes into the cold air intake Joe.

My Furnace Here is my set-up. I keep the feed pipes from the wood furnace as short as possible. The CFM is not as good as the regular furnace, but it distributes well.


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The cold air feed is near the floor in the back. My furnace Playing with picture size.


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  • Jan 21, Messages: Damper I have my wood stove ,home made, next to my funace, and had a custom plennum made to go up and over to the furnace plennum.

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