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Posted by HeatPro on February 14, 2006 at 09:57:41:
In Reply to: American Standard Efficiency posted by Martin on February 13, 2006 at 23:15:01:
The unit was made before efficiency tests were begun. The older gas atmospheric boilers were in the area of 60% efficiency.
You need some heat to just heat up the pipes, water and radiators before you get heat from them, so you can choose a boiler to satisfy the heat loss, an IBR rated boiler of about 50,000 btuh which already allows for this or get a boiler in the area of 75,000 btuh input.