I have a Peerless, oil-fired boiler that supplies both heat and hot water to a 2 bedroom ranch.
Since the boiler has to run to keep hot water for daily use, even when home heating is not required, I have been investigating having a propane-fired Rinnai tankless system installed. I could shut down the boiler during the months when no home heat is needed (probably 8 months out of a year) and just use the Rinnai for daily hot water needs. I was ready to give the go-ahead for this installation until the guy who did the service/maintenance on the boiler came the other day.
He mentioned something I have never heard of...a "Triangle Tube
Indirect Fired Water Heater" http://www.triangletube.com/TriangleTubeProduct.aspx?CatID=6&PID=2
He said he uses one with his oil furnace and has seen a 25% reduction in oil use.
What to do? Anyone familiar with these Indirect Fired Water Heaters?
Just looking to save some money in the years ahead and would appreciate any feedback.