Efficiency of Hydrother HC-85 ?


Old 01-05-14, 08:31 AM
Thread Starter
Join Date: Dec 2010
Location: USA
Posts: 35
Received 0 Votes on 0 Posts
Efficiency of Hydrother HC-85 ?


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.
Sponsored Links
Old 01-05-14, 10:46 AM
NJT's Avatar
NJT is offline
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 2 Votes on 2 Posts
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)

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes
Ask a Question
Question Title:
Your question will be posted in: