Efficiency of Hydrother HC-85 ?

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Old 01-05-14, 08:31 AM
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Efficiency of Hydrother HC-85 ?

Hi,

I was just curious if anyone knows of the efficiency of the Hydrotherm HC-85 natural gas model? I have one, and it must be at least 45 yrs old but it works very well.

I keep reading about 90+ percent efficent furnaces... and perhaps boilers too. I was just crious what efficiency thsi unit was.

thank you.
Acie
 
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Old 01-05-14, 10:46 AM
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COMBUSTION efficiency is one thing.

AFUE (Annual Fuel Utilization Efficiency) is another altogether.

Combustion efficiency is going to be around 80-ish percent.

AFUE probably around 75 or so? (not rated - too old - exhaustive testing in lab needed to determine)
 
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