Home » Public Forums » GMCnet » Heat Pump (Which way to go?)
| Heat Pump [message #89657] |
Wed, 23 June 2010 21:10  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Senior Member |
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It's time to replace my old, originaly roof Ac unit, and I've been looking at the Dometic, Carrier, and Coleman units. Seems to be quite a difference in price from the basic units to the low-profile, heat pump units.
Does anyone have any experiences (positive or negative) with the heat pump units? I like the idea of having the ability to simply plug into the electrical grid and have heat if I need it as well. I would like to know how well these units work before plunking down the money for one. Unfortunately, I really like the look of the low profile units, so that seems to bump the price up considerably.
Thanks for the opinions!
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: Heat Pump [message #89663 is a reply to message #89657] |
Wed, 23 June 2010 21:46  |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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| Quote: |
...Does anyone have any experiences (positive or negative) with the heat pump units....
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George, You get more BTU's of heat from a heat pump than strip heat.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: Heat Pump [message #89669 is a reply to message #89657] |
Wed, 23 June 2010 22:24 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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I have a Coleman Mach 3 TSR heat pump. Cool is fantastic, warm is just warm. I have a catalytic heater that works pretty well, but the sleeping area still stays cold (hey that sounds like a country song!)
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Heat Pump [message #89673 is a reply to message #89669] |
Wed, 23 June 2010 22:29 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Like Ken mentioned, after 40-45 degrees, there is not much heat generated.
I use it frequently in the Fall and Spring.
On Wed, Jun 23, 2010 at 8:25 PM, Randy <Acrosport2@hotmail.com> wrote:
>
>
> I have a Coleman Mach 3 TSR heat pump. Cool is fantastic, warm is just
> warm. I have a catalytic heater that works pretty well, but the sleeping
> area still stays cold (hey that sounds like a country song!)
> --
> Randy
> 1973 26' Painted Desert
> Ahwatukee (Phoenix) AZ
> _______________________________________________
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Heat Pump [message #89697 is a reply to message #89657] |
Thu, 24 June 2010 08:58 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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I don't think I'll be doing a lot of cold weather camping, but it would be nice to be able to take the chill off of the evening air some nights.
I guess my main quandry is whether it's worth spending the extra to get a heat pump versus just an AC unit. My understanding is that a heat pump is really nothing more than a reversable air conditioner. Very cold nights could be taken care of by another heating unit (furnace or catalytic heater).
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: Heat Pump [message #89709 is a reply to message #89657] |
Thu, 24 June 2010 10:45 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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1-ton heat pumps simply don't have enough btu's to heat effectively below 40*. Now 3 ton units, like on a house, can. the space makes a difference too. If you are not used to heating your home with a heat pump, then you will always feel cold. The air is not as hot, but if the unit runs long enough, it will eventually heat the coach to a comfortable, albiet a bit chilly, temp.
I have two 3.5 ton units on my home. Keep the house nice and warm (to my taste) on those cold nights, even in AZ it gets below freezing in the winter at night.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] Heat Pump [message #89712 is a reply to message #89697] |
Thu, 24 June 2010 10:57 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Heat pumps, when WATER based, are quite good for both
heating and cooling. They don't work very well for
cooling if that water gets much above 80 or 85 degrees.
The same goes for heating, when the water gets below
40 degrees. This is what I have on my boat, so I speak
from some experience.
For home use, using water from well below the surface,
they are pretty good for both heating AND cooling. If
I remember correctly, that water normally runs at about
60 degrees, year round.
Since ALL air conditioners are limited in the temperature
difference they can attain/maintain between ambient
(outside) and interior temperatures, I doubt that I would
spend the extra money to buy an air-based heatpump.
I would suggest the use of the quartz-type space heaters
if 120V AC is readily available or catalytic heaters if
you want/need heat in cooler temperatures.
* * * * * * * * *
* Mac Macdonald *
* Oklahoma City *
** "Money Pit" **
* '76 ex - P.B. *
* * * * * * * * *
To: gmclist@temp.gmcnet.org
From: GeorgeRud@aol.com
Date: Thu, 24 Jun 2010 08:58:25 -0500
Subject: Re: [GMCnet] Heat Pump
I don't think I'll be doing a lot of cold weather camping,
but it would be nice to be able to take the chill off of
the evening air some nights.
I guess my main quandry is whether it's worth spending the
extra to get a heat pump versus just an AC unit.
My understanding is that a heat pump is really nothing more
than a reversible air conditioner. Very cold nights could be
taken care of by another heating unit (furnace or catalytic
heater).
--
George Rudawsky
Chicago, IL
75 Palm Beach
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Heat Pump [message #89714 is a reply to message #89712] |
Thu, 24 June 2010 11:13 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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All this bench racin' talk about heating and cooling reminds me of what my
High school AGriculture Shop teacher told me. "Kid, there ain't no free
lunch" Everything you do in mechanical endeavors involves some kind of a
trade off. Morality vs pleasure was how he put it. He was into animal
husbandry, too. He later was teaching us a class in farm equipment safety,
demonstrating the right way to get off of a tractor. We had a NAA Ford wheel
tractor that had the clutch pedal that was a small rod that would fit
between the heel and sole of your boot. He still had the tractor running, in
gear with his boot on the clutch. When he stepped off the tractor, his foot
came off the clutch and he ran over his own leg and spent the rest of the
school year in a cast. Sure taught me a fine lesson in tractor safety. I
guess that you can have 20 years worth of experience once, or 1 years worth
of experience 20 times. Our choice. FWIW.
Jim Hupy
Salem, Or
78 Royale 403
On Thu, Jun 24, 2010 at 8:57 AM, D C *Mac* Macdonald <k2gkk@hotmail.com>wrote:
>
> Heat pumps, when WATER based, are quite good for both
> heating and cooling. They don't work very well for
> cooling if that water gets much above 80 or 85 degrees.
> The same goes for heating, when the water gets below
> 40 degrees. This is what I have on my boat, so I speak
> from some experience.
>
> For home use, using water from well below the surface,
> they are pretty good for both heating AND cooling. If
> I remember correctly, that water normally runs at about
> 60 degrees, year round.
>
> Since ALL air conditioners are limited in the temperature
> difference they can attain/maintain between ambient
> (outside) and interior temperatures, I doubt that I would
> spend the extra money to buy an air-based heatpump.
>
> I would suggest the use of the quartz-type space heaters
> if 120V AC is readily available or catalytic heaters if
> you want/need heat in cooler temperatures.
>
> * * * * * * * * *
> * Mac Macdonald *
> * Oklahoma City *
> ** "Money Pit" **
> * '76 ex - P.B. *
> * * * * * * * * *
>
>
>
>
> To: gmclist@temp.gmcnet.org
> From: GeorgeRud@aol.com
> Date: Thu, 24 Jun 2010 08:58:25 -0500
> Subject: Re: [GMCnet] Heat Pump
>
> I don't think I'll be doing a lot of cold weather camping,
> but it would be nice to be able to take the chill off of
> the evening air some nights.
>
> I guess my main quandry is whether it's worth spending the
> extra to get a heat pump versus just an AC unit.
>
> My understanding is that a heat pump is really nothing more
> than a reversible air conditioner. Very cold nights could be
> taken care of by another heating unit (furnace or catalytic
> heater).
> --
> George Rudawsky
> Chicago, IL
> 75 Palm Beach
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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List Information and Subscription Options:
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| Re: [GMCnet] Heat Pump [message #89752 is a reply to message #89697] |
Thu, 24 June 2010 17:38 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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Exactly - so if you are plugged in at a campste use their electricity
to warm the place instead of your propane.
Ljdavick at comcast.net
On Jun 24, 2010, at 6:58 AM, George Rudawsky <GeorgeRud@aol.com> wrote:
>
>
> I don't think I'll be doing a lot of cold weather camping, but it
> would be nice to be able to take the chill off of the evening air
> some nights.
>
> I guess my main quandry is whether it's worth spending the extra to
> get a heat pump versus just an AC unit. My understanding is that a
> heat pump is really nothing more than a reversable air conditioner.
> Very cold nights could be taken care of by another heating unit
> (furnace or catalytic heater).
> --
> George Rudawsky
> Chicago, IL
> 75 Palm Beach
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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