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Re: [Shop-talk] Heat Pumps? (part 1 of 2)

To: "John T. Blair" <jblair1948@cox.net>
Subject: Re: [Shop-talk] Heat Pumps? (part 1 of 2)
From: "David C." <cavanadd@verizon.net>
Date: Sun, 21 Sep 2008 19:55:52 -0700
Thanks, John; all good info.  I am considering an air to air heat pump. 
  We considered geothermal, but the cost would be prohibitive, and our 
soil type (hardpan clay) wouldn't work well with a heat exchange coil.

Since the summers and winters are pretty moderate around here I think a 
heat pump would work OK.  We would keep the propane furnace for 
supplemental heat, and I'm aware that the "heat" that they provide in 
the winter isn't the same as a regular furnace.  Since we have heating 
vents in the floor already, it should be alright.



John T. Blair wrote:
> At 10:46 PM 9/20/2008, David C. wrote:
> 
>  >We're thinking of installing a heat pump in the near/medium term (this
>  >year or next).  We live in the north Puget Sound area, so it never gets
>  >really cold, and the summers are moderate, but July and August can get
>  >into the high 80s occasionally....
> 
> David,
> 
> I live on the south eastern coast of VA where the Atlantic Ocean and the
> Chesapeake Bay meet.  Our summers are typically in the high 80s low 90s
> with some 100 thrown in.  Winters are usually mild in the low 40s, 
> occassionally
> dipping into the 30s and very seldom into the 20s.
> 
> Most of the homes built since the mid 70s have heat pumps.  I've lived in
> this house since 84 and am on my 3 heat pump.  Average life being about
> 12 years.
> 
> You didn't go into the types of heat pumps only the SEERS which do go up
> depending on the type.  Also within a type there are varying SEERS.  The
> most common around here is the air to air unit which is what I have.   
> These
> work well in the moderate climates, but when the temps get up to over 90 
> for
> a period of time, or below about 45 they can't do good job at heating or
> cooling.  Currently when we hit the 100s I can barely pull my house 
> below 80,
> and in the winter it can't really heat it.  So we have to have 
> additional heating
> in the way of electric heating elements in the system.  And it gets 
> quite costly
> when them come on for a long period of time.  Assuming that you have 
> adiquate
> ducting one of these units costs about $2,500 to $3000 in our area to have
> the inside and outside units replaced.
> 
> Compaired to something like oil or Gas forced hot air, these units feel 
> cold
> in the winter.  I used to keep my last house about 68-70 in the winter.  We
> had oil then gas forced hot air heat.  When the heat came on, you felt 
> warm!
> The vent temps for heat is about 88 deg, and the unit has to more a lot 
> more
> air due to the lower temps (than forced hot air).   My house is a ranch 
> style
> so the ducting is in the attic and the vents are in the ceiling.  In the 
> winter
> the ceiling is about 84 deg. but the floor is about 60.  Hot air rises. 
> :(  So
> you're feet will freeze and you'll feel cold.
> 
> My house is about 1500 sq ft of heated/cooled space and is all 
> electric.  On
> the "Budget" payment plan my electric bill runs about $217 a month and we
> are paying about 8 to 9 cents per KWHr for our electricity.
> 
> continued.....
> 
> John T. Blair  WA4OHZ     email:  jblair1948@cox.net
> Va. Beach, Va
> Phone:  (757) 495-8229
> 
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