Coal Stove Heat Circulation in Large Room

Coal Stove Heat Circulation in Large Room

PostBy: jerplay On: Mon Dec 10, 2012 12:16 pm

Our church just put in an 85,000 btu coal stove with power vent in one of our larger rooms. The hope was that we would cut into our huge fuel oil costs. The room is similar to a basement as about 6 feet of the walls are under ground. It has 12 foot ceilings. It has concrete block walls. Our hope in the long run is to insulate the walls and put in a drop ceiling but for now we are stuck. Our idea was to run it for 24 hours before church. So starting about 11am Saturday morning. I just put it in this past weekend so it wasn't really lit till 4:30 in the afternoon. It was not cold here this weekend. Mainly in the 40's. It was 57 degrees in the room when it was lit and only made it up to 64 degrees by 11am the next day. Very Disappointed. As an owner of a similar stove I was expecting much better results. So when I got there I turned up the fuel oil baseboard to get it up to 70. It only took 30 minutes to do so. Normally it takes a few hours to bring it up a few degrees. So it seems like the heat is in the room but maybe sitting up above our heads. This room is shaped like a large rectangular box with no other walls. What can I do cheaply to get that heat circualting through the room better?

Also could a coil be put into the stove and attached to the heating registers to help maximize the heat the stove is putting out? Thanks so much!!!
jerplay
 

Re: Heat Circulation in Large Room

PostBy: fezna141 On: Mon Dec 10, 2012 12:21 pm

What kind of stove is it? Is there a blower fan on it? Also I know with my stove in my basement it can take up to two days to heat the walls up until it gets nice and warm, then the heat stays in the basement until i shut it off but then when i restart it i have to wait for the initial heat up again because of the block walls being so cold.
fezna141
 
Stove/Furnace Make: Alaska
Stove/Furnace Model: Channing II

Re: Coal Stove Heat Circulation in Large Room

PostBy: jerplay On: Mon Dec 10, 2012 12:35 pm

Yes it has a blower on it. I'm not sure what brand it is. But is is similar to my Alaska Channing III accept it has a plate to feed it instead of an auger.
jerplay
 

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Re: Coal Stove Heat Circulation in Large Room

PostBy: fezna141 On: Mon Dec 10, 2012 12:42 pm

i have a channing II. well then in my experience you might be having trouble because of the cold block needing to be heated up first each time which is going to give you a problem getting the room up to a nice temp quickly. If you can leave the stove running that would be your best bet, even if you could keep a small fire and then just turn it up before mass it would get the temp up quicker because the walls will already be much warmer than they would from an initial start-up.
fezna141
 
Stove/Furnace Make: Alaska
Stove/Furnace Model: Channing II

Re: Coal Stove Heat Circulation in Large Room

PostBy: Rob R. On: Mon Dec 10, 2012 12:58 pm

jerplay wrote:The room is similar to a basement as about 6 feet of the walls are under ground. It has 12 foot ceilings. It has concrete block walls.


You have several things working against you.

1. Concrete block walls (uninsulated?)...that is a huge amount of mass to heat up.
2. 12' ceilings...if the ceiling is uninsulated that is even worse.

I used to heat a large house with a coal stove in the basement. If we went away on a trip and let the stove go out, it took almost 2 days to get the basement and everything back up to temperature. It's like trying to get a freight train up to speed...lots of mass to get moving.

:idea: Try letting the stove keep the room at 65 or so and use the oil unit to blast it up to 70 before Church. A ceiling fan might help move the heat around.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Coal Stove Heat Circulation in Large Room

PostBy: jerplay On: Mon Dec 10, 2012 2:01 pm

Yes uninsulated block walls and the ceilings are concrete as well with another floor above. I will try starting it up on Friday night instead of Saturday. I just wish I knew the best way to keep the air moving in the room.

Does anyone have experience with the coils? I've seen them set up to where it heats the water in a hot water heater. I'm wondering could it be rigged to something similar for a huge bank of registers since when the coal stove is being used the fuel oil boiler is not running.
jerplay
 

Re: Coal Stove Heat Circulation in Large Room

PostBy: vulcan On: Mon Dec 10, 2012 2:03 pm

I find ceiling fans to be very helpful especially if your dealing with 12 ft ceilings if its possible to install them.
vulcan
 
Hot Air Coal Stoker Stove: keystoker koker 160

Re: Coal Stove Heat Circulation in Large Room

PostBy: Rob R. On: Mon Dec 10, 2012 2:32 pm

jerplay wrote:Yes uninsulated block walls and the ceilings are concrete as well with another floor above. I will try starting it up on Friday night instead of Saturday. I just wish I knew the best way to keep the air moving in the room.

Does anyone have experience with the coils? I've seen them set up to where it heats the water in a hot water heater. I'm wondering could it be rigged to something similar for a huge bank of registers since when the coal stove is being used the fuel oil boiler is not running.


There are several forum members that installed coils in their stove and tied it into a boiler & radiators. The heat output from the coil is relatively low, and whatever heat the coil scavenges will not be available for the large room you are trying to heat.

If the room is open, the air should move around pretty well on it's own. You simply aren't allowing enough time for that stove to heat up thousands of pounds of concrete.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Coal Stove Heat Circulation in Large Room

PostBy: mdrelyea On: Mon Dec 10, 2012 4:26 pm

jerplay wrote:I just wish I knew the best way to keep the air moving in the room.


Couldn't you just set up some box fans to move the heat around? Turn them on when you light the stove and turn them off when service starts. It'd be a pretty cheap solution.

Mike
mdrelyea
 
Hot Air Coal Stoker Furnace: Alaska 140 Auger
Hand Fed Coal Stove: Russo #2
Coal Size/Type: Anthracite Rice/Nut

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