The 80% unit is clear not as energy efficient as the higher rated models. If
he was trying to say otherwise, he is an idiot (or a lair) as others have
suggested. However, that is only part of the picture. He may have been
talking about total cost over the life of the unit.
When we replaced our furnace five years ago, the price of gas was lower so
the math may work out differently for you today. However, we went with at
85% efficiency unit because the step up to a 90+% unit cost more than it
would save in ten years. Also, we heard from several companies the the
higher efficiency furnaces were more prone to failure and costly repairs.
That part of the picture may also have changed in the intervening years.
Several companies gave us general advice to go with the lowest efficiency in
a condensing type furnace (low temp exhaust).
Check out the repair histories on the various brands and models. Work
through the math of energy cost plus unit and installation costs. Do the
reseach and make your own decision.
and I live in an area where the difference between 60% and 80% AFUE
means an annual difference IN TODAYS ENERGY PRICES of less than $20 A
We ALMOST don't need a furnace, but must pay and OUTLANDISH price
because 80% AFUE is mandated by the Federal Government. When I build
the new house, I can afford to put in anything I want, but
I WILL NOT PAY FOR ANYTHING MORE THAN THE ABSOLUTE WORST EFFICIENCY
FURNACE I CAN FIND. In my area, heating efficiency will NEVER payback
in the lifetime of the furnace. The cost difference between 80% and
92% will NEVER be recovered.
www.hvacopcost ways I will save about $90, but it says that I spend $689
for heat, and I KNOW that I spend less than $200 TOTAL NOW.
He may have been (didn't come across that way though), but seeing as I
would be paying $1200 more for this guy to install an 80% furnace with
VS instead of a 93% 2 stage, somehow I don't think I would be able to
recoup that 1200 in the near future...
Thanks... Got 3 more contractors this week and after that away we go...
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