Hey Genger, im going to hook up a hot water device too my stove too being its going most of the time in the winter, so why not use that heat to get the water to 140 degrees. Heres what im going to do. I don’t want the water getting to the boiling point because of the pressure then Id have to have a steam pressure release valve to blow off the extra pressure. What im going to do is take and make a box about 2 ft. square by 12″ high and mount that over the shroud that covers the twin stove pipes. Im going to get a thermometer and hang it at diffrent heights over the stove to find that 140 degree area. I know it will depend on how much wood im burning and if the blowers running or not. In the past i’ve sometimes put my stovewood on the old shroud to dry it out if it has gotten wet and it sometimes gets hot enough to ignite the wood to the point where it will burn. So Im looking for that average height to hang the upside down box and I think thats going to be around 24″ or a little more.
What im going to do is make that box and wrap copper tubing around on the inside of it. Im thinking a 12″ sided box by 24″ square, wrap the copper coils around the inside then hang it upside down over the stove. I think wraping the coils around the firebox and the water would boil and pressureize the system too much, even with a boiler pump and routeing it back to the water heater where it would cool some. I don’t know it may be the thing I’ll have to do too but im going to try hanging it above the stovepipe shroud first.
Im going to use copper pipe for the coiling and connect those coils to sometype of flexable water grade pipe so I can raise and lower it if I need too, then run the water through pipeing that connects to the water heater. I’ve also got a water pump from our old boiler system and im going to use the sending unit and thermostate setup from it to get a temperature of the water. When it reaches a certain temperature in the copper coils the pump comes on and pumps the water to the waterheater where its stored. You could keep the pump running continously because thier a low amp. pull pump. I asked a boiler repair guy one time how many amps. He said the pump pulls minimal amps. and only about $15 a month if it ran continously so not a major expense there. I want to put in the thermostate so it only comes on when the waters at 140 degrees. I think tapwater is in that range so it dosent burn the hands accidently when the faucet is being turned on. It can be done and i’ll find the area and range I need to have.
I split the stovepipe up and ran it across the top of the stove because thats immediate heat to heat the house with or it just goes up the stack. You know how the pipe heats up in a matter of a few minutes, way befor the firebox does and you need that befor you get any heat to blow out of the holes on top, I took the entire top off and ran the stove pipe over the top of the stove so the blower blows that immediate heat into the house. As soon as the pipe heats up I get heat whick is just a few minutes. When the firebox heats up I’ll not only get the heat from the hot stovepipe but now heat from the firebox too, or both of them. The shroud that goes over the top and is connected to the sides of the stove covers the stovepipe and is connected to the furnace ductwork and the blower pushes it throughout the house. If you get that water system built let me know how it works. I know mines going to work good.