I've installed a "Thermo-Control" wood buring stove with stainless steel "coils" to heat water. I supplement both the "oil fired" base board heating system and the hot water heater for bath/drinking water system
I have it plumbed (done by another board member for that matter) where the return water from the base board system runs thru the "Thermo-Control" wood fired stove before going into the oil fired boiler.
Basically I can just run oil..or wood using the same thermostats and circulators.
So far its proven capable of completely roasting our house even with the temps in the single digits.
It uses twice as much wood as my old wood stove did..but its firebox is also twice as big. I used to get thru a winter with five face cords...now I have to plan on a full 10 face cords of wood. MORE reason to excercise my CAD habit up on our farm! The radiant heat alone can heat the bottom 1/2 of the house. We use fire size to get things in the ball park.(Usually only about 1/3 full as anything more than 2/3's full of wood creats way too much heat for this 2400' square foot two story farm house..even with its lack of insulation in some of the walls! It does have new windows and insulation in the attic)
In addition to simplistic "fire size" method as a means of control heat output, this particular stove installation has a control system where there is an "auqastat" on the exit water pipe to the oil fired boiler. This "aquastat" is effectively a reostat controled by the water temperature. When the water temps approach 175-180, the "auqastat" adds resistance to the electic feed (from a 24 volt tranformer) to a little motor that opens and closes an air duct supplying the stove with air. When its closed, the fire dies rapidly. Also have a "saftey" device on the flue pipe to where the power is cut to the air supply motor if temps get too high in the flue...
Any way the ONLY problem we have has NOTHING to do with the stove. We have an old chimney which need to be replaced....I lined it with a stainless steel flue pipe/liner. Its safe. BUT the chimney is about 4 feet too short and when the wind comes out of the south/west, the turbulance at the top of our house and chimney restricts the flow. Conversely when the wind comes out of the north or east, it sucks the air thru the stove at a furious rate...makes for one hot fire! The theromometer on top of the stove aproaches 475 degrees with north winds, 325 with south/western winds of 35plus mph. Was a problem with our wood stove...worse now with this monster we have installed as I don't have an effective way to shut off the flue...yet. either way the house stays warm with no oil assistance. Just a little smokier when adding wood to the fire when the wind is coming from the wrong direction for that old..to be REPLACED chimney.
We budgeted a chimney for next year.....
All in all its proving to be money well spent. About $3000 for the stove and another $1000 for bits and pieces to install. Most installations should happen for under $5000 is my guess. Our installation was more complex than most....and they sell stoves for hot air and actual boilers to add onto base board heating systems as well. Definitely worth a look if you want an indoor option vs. an external wood fired boiler.
As I mentioned before, I plan to replace our chimney..but I may also add a 30-50 gallon tank to stack the heated hot water from the stove and have the return from the house go to this tank first..actually how Thermo-Control suggests for an installation such as mine where the wood stove is a distance from the boiler. The reason I didn't in the first instance was my current system has a 30 gallon storage capacity in that old boiler I have...another story.
Ultimately we planned to turn the "thermo-Control" stove into a backup for an OWB but time and dollars made that impossible for this year, and with oil being over $5 a gallon when we started this...added a panic to the time frame! AND when we sell out and move south..which we will over time, I can take this Thermo-Control unit with me. I really like it. If the chimney next year is a success..maybe I won't even bother with a OWB. Time will tell.
ALSO this little Central New York company provided excellent advise and technical assistance to our unconventional installation....I really appreciate their help.
The company has a website:
http://www.thermocontrolheating.com/
Their location is:Thermo-Control Heating Systems, LTD
PO Box 640
Cobleskill, NY; 12043
And they ARE in Cobleskill as I picked up my stove from their fabrication facility.