"j j" wrote in message
...

"CBHvac" wrote in message
...

Hi,
Big cast iron thingy alright but at what efficiency?

50% or 60% maybe? Seen a few old oil units that MIGHT make it to the 50%
range...and have seen more than one Chrysler Airtemp gas unit that was
feeling frisky if it saw 65%....

so, let's say current furnace is 50% efficient.
let's say we get a 90% efficient one. how much less fuel is that per year?


Give or take your situation, and usage, between 55%% to 62% less..Installed
correctly, depending on your fuel costs not, it could, theoretically, have a
tremendous payback.
Altho, I dont sell on the payback theory, since you have to pay to get it
installed, and it does cost every time you turn it on.