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Groups > sci.electronics.design > #431014
| From | Winfield Hill <hill@rowland.harvard.edu> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: heatpump vs furnace |
| Date | 2016-10-12 09:46 -0700 |
| Organization | Rowland Institute |
| Message-ID | <ntlpd0017fm@drn.newsguy.com> (permalink) |
| References | (1 earlier) <pn4gvbhdutngkknagei0ubi8lek3umc7v7@4ax.com> <nt9dpt07qb@drn.newsguy.com> <q7mdnVGeSbycmGDKnZ2dnUU7-T2dnZ2d@giganews.com> <ntlc010ihl@drn.newsguy.com> <MyNameForward-754569.10330312102016@88-209-239-213.giganet.hu> |
Ecnerwal wrote...
>
>In article <ntlc010ihl@drn.newsguy.com>,
> Winfield Hill <hill@rowland.harvard.edu> wrote:
>
>> instructions to change to 50 degrees. They claim
>> heatpump heating is cheaper than oil, but I doubt
>> it! Anybody have experience with a hybrid system?
>
> That depends very much on the specifics of the heat pump
> (COP) and the price of the two fuels, and the efficiency
> of the oil burner. In many cases it's true, particularly
> with a proper cold-climate heat pump (which a 40 F
> switchover - does not sound like.)
>
> The good cold-climate mini-splits will put out 3X the heat
> (COP of 3 or more) as the electricity put into them, and
> operate effectively down to sub-zero F temperatures.
Whoa, 3x! Is that at high outside temps? Apparently
my system will work fine to far below freezing (runs
at 40-degrees with a modest duty cycle), even includes
automatic defrost features. Maybe the default 40-degree
setting is considered an economic tradeoff point. Our
installer says the electric heat-pump is cheaper down
to 40 degrees; clearly I need to research the numbers.
--
Thanks,
- Win
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10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 11:16 -0700
Re: 10 mega-watt hours Jon Elson <jmelson@wustl.edu> - 2016-10-07 14:13 -0500
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Re: 10 mega-watt hours makolber@yahoo.com - 2016-10-07 13:08 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 14:27 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 14:09 -0700
Re: 10 mega-watt hours Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-07 14:18 -0700
Re: 10 mega-watt hours Ralph Barone <ralph@invalid.com> - 2016-10-07 22:40 +0000
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 16:42 -0700
Re: 10 mega-watt hours Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-07 17:35 -0700
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 09:09 -0700
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Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 11:10 -0700
Re: 10 mega-watt hours Bob Engelhardt <BobEngelhardt@comcast.net> - 2016-10-09 12:30 -0400
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-09 10:26 -0700
Re: 10 mega-watt hours Ralph Barone <ralph@invalid.com> - 2016-10-08 23:38 +0000
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 18:13 -0700
Re: 10 mega-watt hours Ralph Barone <ralph@invalid.com> - 2016-10-09 05:02 +0000
Re: 10 mega-watt hours Jeff Liebermann <jeffl@cruzio.com> - 2016-10-08 23:29 -0700
Re: 10 mega-watt hours Chris Jones <lugnut808@spam.yahoo.com> - 2016-10-09 11:42 +1100
Re: 10 mega-watt hours Martin Riddle <martin_ridd@verizon.net> - 2016-10-07 17:30 -0400
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-07 17:14 -0700
Re: 10 mega-watt hours Jon Elson <elson@pico-systems.com> - 2016-10-11 10:28 -0500
heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 05:57 -0700
Re: heatpump vs furnace bill.sloman@ieee.org - 2016-10-12 07:33 -0700
Re: heatpump vs furnace "dcaster@krl.org" <dcaster@krl.org> - 2016-10-12 17:41 -0700
Re: heatpump vs furnace bill.sloman@ieee.org - 2016-10-12 18:26 -0700
Re: heatpump vs furnace "dcaster@krl.org" <dcaster@krl.org> - 2016-10-13 06:45 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 18:57 -0700
Re: heatpump vs furnace bill.sloman@ieee.org - 2016-10-12 22:36 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-13 03:57 -0700
Re: heatpump vs furnace Ecnerwal <MyNameForward@ReplaceWithMyVices.Com.invalid> - 2016-10-12 10:33 -0400
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 09:46 -0700
Re: heatpump vs furnace Ecnerwal <MyNameForward@ReplaceWithMyVices.Com.invalid> - 2016-10-12 14:39 -0400
Re: heatpump vs furnace Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-12 08:10 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-12 09:39 -0700
Re: heatpump vs furnace makolber@yahoo.com - 2016-10-12 13:02 -0700
Re: heatpump vs furnace Winfield Hill <hill@rowland.harvard.edu> - 2016-10-13 06:10 -0700
Re: heatpump vs furnace "David Eather" <eather@tpg.com.au> - 2016-10-15 14:47 +1000
Re: heatpump vs furnace krw <krw@nowhere.com> - 2016-10-15 10:56 -0400
Re: heatpump vs furnace "David Eather" <eather@tpg.com.au> - 2016-10-17 12:47 +1000
Re: heatpump vs furnace krw <krw@nowhere.com> - 2016-10-17 19:50 -0400
Re: 10 mega-watt hours sean.c4s.vn@gmail.com - 2016-10-12 06:13 -0700
Re: 10 mega-watt hours Yzordderrex <powersupplyguy@netzero.net> - 2016-10-13 07:52 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-13 08:09 -0700
Re: 10 mega-watt hours Yzordderrex <powersupplyguy@netzero.net> - 2016-10-14 03:05 -0700
Re: 10 mega-watt hours Winfield Hill <hill@rowland.harvard.edu> - 2016-10-14 05:52 -0700
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