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Posted by JohnWill65 on November 02, 2005 at 13:14:48:
I have an ancient coal boiler that was converted to gas about 40 years ago. I am not surre of the brand but it has a shamrock embossed on the front ('Ideal'-something, I think). Any idea wht the eeficiency of one of these dinosaurs is? I remember reading around 25% here once, but the plumber who looked at at asy it could be 60% Thanx.