On 01/27/2015 04:26 PM, Tony Hwang wrote:
Pico Rico wrote:
A friend has a house in the mountains. No A.C. The furnace is as old as
the house, probably 1965 or 1970. Are new furnaces more efficient in
their
use of natural gas, and thus "pay for themselves"? If so, how does one
calculate the anticipated savings and pay back period?


Hi,
New high efficiency furnaces are as high as 98%. Regardless cost, up
here in Canada lagally low to mid efficiency furnace can't be installed
on new install. Think your friend's furnace is not even mid
efficiency(80%) being that old.



98% wow

I just had my new one put in yesterday and it is 96% efficient


I expect that compared to the 80% furnace it replaced and the high
Wisconsin heating bills it should pay for itself in well under 10 years.