If your current yearly heating bill is $1000 and you have an 80%
efficient furnace,

$800 is used for heat and $200 is wasted out the exhaust.



With a 95% efficient furnace,

$800 is still used for heat but only $42 is wasted out the exhaust.


Your yearly heat bill drops to $842 yielding a $158 per year savings.

Over the next 15 years you'll save $2370 in fuel. If fuel prices go up,
you'll save even more.

Can you really afford an 80% efficient furnace?