I installed a Central Boiler E-classic 2300 3 years ago. Their current model is the e-classic 2400. These are cleaner burning than the original outdoor furnaces, and have an EPA certification. I believe that some states don't allow new installations of the older style without the EPA cert.
Anyway- in pretty much all situations, you are better off installing a heat exchanger. Basically, you don't touch the plumbing that circulates water in your radiators at all. Instead, the wood furnace circulates its water through a heat exchanger. The other side of the heat exchanger circulates through the water jacket of your existing boiler.
You put a Taco 007 pump at the wood furnace and it only has to push water into the heat exchanger in your basement.
These things ain't cheap- but we were spending $4k per heating season on propane. Now, the heat is free (except for labor of getting the wood).
Regarding heating your domestic hot water, you buy a "sidearm" heat exchanger that indirectly preheats the water going to your existing hot water heater. The wood furnace water travels through this on its way to the heat exchanger.
A big expense is the super insulated double pipe that sends the water to and from your house. But this is crucial!
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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