"dianne gigler" wrote in message
...
My house is heated by a radiator based hot water heating system powered by
natural gas. Given the expected increase in the cost of natural gas, I
would like to add an auxiliary wood burner to power the hot water system.
I have searched the internet and have found nothing. Am I looking for
something that does not exist or cannot be done? Any help and/or leads
will be appreciated. Thank you.

Yes it can be done.

You need to set up a primary/secondary system. You need a loop so that both
boilers can feed into. Then the 2 boilers, the gas and the wood, will feed
into the loop and the radiator load will feed off the loop. For best
operation, the wood boiler will need to go through a heat exchanger to
hydraulically uncouple the wood boiler from the rest of the system.

I hope you already have the wood fired boiler, because several manufacturers
are promising delivery of boilers in February, if they were ordered in mid
October.

I hope you have some money, because to do it right it's gonna cost about 2
grand or more, just for materials without the cost of the boiler.

Good Luck.