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Posted by big_dgreen on April 27, 2008, 5:47 pm
big_dgreen had written this in response to
http://www.www.thestuccocompany.com/hvac/Re-Which-Carrier-gas-furnace-Performance-80-or-93-31809-.htm
:
I agree that it varies from installation to installation, electric hp done
properly most people seem happy. Ones that think they aren't happy have
normally had gas heat in the past and need to realize that a hp is a
gradual source of heat, not a turn it on and get 180 degree air heat.
Which I'd rather have a gradual cheap heat. Because once it's down to temp
it's down to temp no reason to complain.
On a geothermal, in my neck of the woods there are 2 types. Ones that the
installer didn't size the ground loop properly on, and the ones that the
installer filled the hole in with the same red clay that he took out of
it. Point is if you live in my part of the country, southern mountain
lands oklahoma. Clay doesn't have the same heat transfer capacity that
loose dirt and soil does. Resulting in an expensive pos. I have seen the
properly installed units, which around here consist of burying a seperate
septic tank filled with fresh water and a ground loop and a float valve.
That's a very very very efficient system. Very costly to the 'poor' folk
like me.
Maybe you should look at a Dual Fuel Heat Pump, very efficient, and very
effective! (i personally believe it's a waste of a heatpump but then again
I won't use gas heat)
-------------------------------------
KJPRO wrote:
>> message
>>
>> On Apr 26, 2:13 pm, "geothermaljones"
>> wrote:
>> > 13% more efficient will pay for itself over time... Make sure
>>> it's at
>> > least
>> > a 2 stage.
>> > A Heat pump can save you thousands over time, depending on
>>> your design
>> > conditions,utility rates, etc...
>> > and might be the place to spend your dough...
>> >
>> > Some Ludites will disagree,
>> >
>> > geothermalones
>> >
>> >
>> >
>> >
>> >
>> >
>> > > I have to choose between the Carrier Performance 80 and
>>>> the Carrier
>> > > Performance 93. My average yearly gas bill comes to $410
>>>> for heat
>> > and hot water. So there's not much to save. Since the
>>> Performance
>> > > 93 costs an additional $800 for the furnace alone --
>>>> chimney and
>> > > condensate pump extra -- I'm leaning towards the
>>>> Performance 80.
>> > > Any comments worth more than a penny?
>> > > Thanks, Herb- Hide quoted text -
>> >
>> > - Show quoted text -
>>
>> Depending on the climate on is in will depend on the success of a
>> heat
>> pump. Is it a ground source or air source?
> I see you missed this part of the OP's post:
> Quote:
> My average yearly gas bill comes to $410 for heat
> and hot water.
>> If air source and you live in a cold climate the electric strip
>> heaters will come on and reduce the system efficiency over the
>> heating
>> season.
> Will depend on ones utility costs... in a lot of area's, the
> combination of
> HP/Electric will still be cheaper to operate then a gas fired furnace.
>> If it is ground source, the expense will be high to install and
>> over
>> its life time one will seldom recoup their investment.
> Once again, it will depend on MANY variables, so your above comment
> isn't
> really warranted. It only discourages people from using less energy.
>> For the
>> difference in cost between and ground source heat pump and the
>> forced
>> air high efficiency furnace. If one took the saving of the two
>> units
>> and put it into Whole House Performance the saving would be more
>> than
>> a ground source heat pump could save. And most of the WHP fixes
>> are
>> for the life of the structure, I doubt a heat pump can do this.
>>
>> Regardless of the heat pump if the house is not efficient the
>> customer
>> may not be happy. I worked in the Dayton Ohio area to 1.5 years
>> doing
>> energy analysis and more people with heat pump (air source) were
>> not
>> happy with them. The ducts were in the slab around the perimeter
>> of
>> the house and the air temp 80 deg F blowing out on a cold day was
>> uncomfortable.
> I see many systems where the people are not happy with them... first
> you
> need to look at the installation. Don't blame the equipment, till you
> can
> understand WHY they are dissatified with their current equipment. No
> matter
> whether it's a Heat Pump, Gas Fired Furnace, Boiler, etc...
>> So, make your house efficient then choose the heating source and
>> one
>> will be happy.
>> Andy
>> Think "Whole House Performance" it is the right thing to
>> do....
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