Posted by Harold Kestenholz - Hydronic Network on January 04, 2000 at 10:45:41:
In Reply to: Wish to add wood fire alternative to existing gas boiler posted by Mike Salemme on January 04, 2000 at 06:08:51:
jtown is correct. A modern gas boiler is built to accept clean flame. Wood and coal make fly ash; that is why the wood boiler is so large, it requires wide open passages to pass the ash. It is also the reason the wood boiler was manufactured at 45% efficiency. Burning wood to pass through a gas heat exchanger would clog the boiler up in a few days.
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