Groups > sci.electronics.design > #431498

Re: heatpump vs furnace

Newsgroups	sci.electronics.design
Subject	Re: heatpump vs furnace
References	(2 earlier) <nt9dpt07qb@drn.newsguy.com> <q7mdnVGeSbycmGDKnZ2dnUU7-T2dnZ2d@giganews.com> <ntlc010ihl@drn.newsguy.com> <op.ypcx9pwpwei6gd@phenom-pc> <pqg40chamt4g5ct4um6lvid3le2euqk5h8@4ax.com>
From	"David Eather" <eather@tpg.com.au>
Message-ID	<op.ypgh13swwei6gd@phenom-pc> (permalink)
Date	2016-10-17 12:47 +1000

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On Sun, 16 Oct 2016 00:56:04 +1000, krw <krw@nowhere.com> wrote:

> On Sat, 15 Oct 2016 14:47:39 +1000, "David Eather" <eather@tpg.com.au>
> wrote:
>
>> On Wed, 12 Oct 2016 22:57:37 +1000, Winfield Hill
>> <hill@rowland.harvard.edu> wrote:
>>
>>> Jon Elson wrote...
>>>> Winfield Hill wrote:
>>>>> Martin Riddle wrote...
>>>>>>
>>>>>> Do your power credits roll over to the next year? (anniversery date)
>>>>>> I think your allowed to change it once. And most recomend to place  
>>>>>> it
>>>>>> in April/May, so the winter bills can be offset.
>>>>>> You may find that your Jan/Feb bill are 'high'
>>>>>
>>>>> I don't know for sure, but my understanding is the
>>>>> credits do not expire.  However, if we make more
>>>>> than we consume, we don't get paid for any excess.
>>>>> But we can give it to someone else in our district.
>>>>> Like maybe our town's Senior Citizens Center.
>>>>>
>>>> WOW!  They ALLOW you to give the utility energy for
>>>> free!  What an incredibly generous deal!
>>>
>>>  We just replaced our entire HVAC-oil-furnace stack,
>>>  and elected the heat-pump option instead of a simple
>>>  AC compressor.  I've been taking some performance
>>>  measurements, e.g. with Tout = 45 deg, it takes the
>>>  heatpump about 1 hour to raise the house temp by 2
>>>  degrees.  It consumes 5kW, so that's 2.5kWh/deg.
>>>  Whoa, we'll be using far more electricity than our
>>>  roof makes!  The default outside-temp breakpoint
>>>  for switching to the oil burner is 40 degrees.
>>>  I'm studying the thermostat manual's installation
>>>  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?
>>>
>>>
>>
>> don't worry too much - the waste energy turn into heat too
>
> If your intention it to heat the great outdoors.

yeah but half the waste heat goes indoors

Thread

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
    Re: 10 mega-watt hours Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-10-07 12:41 -0700
      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
                Re: 10 mega-watt hours John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-08 09:53 -0700
                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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