Would replacing the most efficient air conditioner and a the most efficient
gas furnace with the most efficient geothermal air conditioner/heater show a
dramatic reduction in the BILLS PAID each month to cool and heat a standard,
suburban, two-story, two-car garage house? What would be the pay back
period on the investment?
Don't eliminate the old heat/cooling (unless those units are long in
the tooth, which you'd replace them). Use a conventional furnace/AC to
augment the geothermal heatpump system, when it cannof fulfill your
heating /cooling needs.
That depends on the cost of the installation, and the present and future
gas and electricity prices in your region. The less energy costs, the
longer it will take to pay back the installation cost with energy
Without details about your installation cost and energy prices, it's
impossible to say whether or not it's a worthwhile investment. And only
time will tell, because we can't predict future energy prices
I priced it out in my region for a new home. Based on an average 4%
increase per year in the cost of natural gas, the payback period is 11
years. A 7% increase per year reduces the payback to less than 8 years.
What is your guess about future energy prices????
I can tell you this.
New home, 2500SF, central NC, R40 walls, R60 ceilings...2 ton geothermal
heat pump installed: $29,000...and I was the cheaper of the quotes..
Monthly bills total less than $30.
Its up to you.
CB, what would be a guess to heat and cool this home you mention with
straight electric, plain old AC, or DX heat pump??
Will it be over $1200 a year??
Seems to me for geothermal you either pay the HVAC company or go with DX and
pay the utility!
Umm...under 16SEER...I imagine so..IIRC, this one was 21SEER
You got that right. I am very happy with my system, but now that we are
going Geo, I am going to change out some things hopefully before winter, and
put in one here and give it a shot. The well that isnt used for anything but
washing cars and lawn watering now is RIGHT beside the outdoor unit....EASY
to run a drop loop down and give it a shot.
With one exception I can see, and correct me if I'm wrong, the market value
of the house with the geothermal unit would rise and the home owner would at
least recoup a percentage of his investment if the home is sold before the
payback period expires.
Again, it varies with the system. Averages are meaningless unless your
installation is average and your installer is average.
Right. Nobody has enough information to predict them accurately. If
they did, they could make a fortune trading futures.
I will in a few months, and I've talked to several people who have.
They like them, but in our region they're expensive and have a long
payback period. This makes them uneconomic when you consider what you
could get if you invested the extra money it would cost. The best
reasons to do it are that your energy costs are already high, you expect
costs to become much higher, or you want to do your part to reduce
pollution and reliance on middle east oil.
Since it will be in a new house, I won't have the direct comparison.
But you can find many references and case studies on the 'net. Google
for it. My supplier tells me that with our costs of electricity and
gas, it will save approximately 50% of heating cost. Since most people
in my region (temperate marine climate) don't use AC, that's probably
less than you'd save if you also use AC.
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