[Greenbuilding] Ductless Heat Pump Performance - November 2011

Richard Garbary richard6 at gmail.com
Sat Dec 3 15:11:16 PST 2011


Paul:

The running amps for that model are impressive: 2.5 - 11.7 amps. Oil
furnace burners alone run between 1.5 - 5 amps! Heat pumps with inverter
technology make this a truly compelling and curve flattening solution. .250
kwh per unit on a mild winter day is remarkable.

Running AmpsCooling: 10.9 (2.5~10.9)
Heating: 11.7 (2.5~11.7)

Power Input (W)Cooling: 1,090 (250~1,090)
Heating: 1,165 (250~1,165)

We have a few townhouse owners on our street with ductless systems for air
conditioning but I don't think they have heating capabilities. And these
townhouses are baseboard electric. I'll have to check into this. Nice to
see Bullfrog getting your business and not Reddy Kilowatt!

Richard



=======================================================
On Sat, Dec 3, 2011 at 11:44 AM, Paul Eldridge <
paul.eldridge at ns.sympatico.ca> wrote:

> Hi Richard,
>
> Both are Sanyo 12KHS71s which are inverter models that continue to supply
> a good amount of heat, economically, down to -22°C (see:
> http://us.sanyo.com/HVAC-**Single-Split-Systems-Wall-**
> Mounted-Heat-Pumps/Wall-**Mounted-Heat-Pump-12KHS71<http://us.sanyo.com/HVAC-Single-Split-Systems-Wall-Mounted-Heat-Pumps/Wall-Mounted-Heat-Pump-12KHS71>
> ).
>
> You can view our main floor indoor air handler at:
> http://i362.photobucket.com/**albums/oo69/HereinHalifax/Img_**0608.jpg<http://i362.photobucket.com/albums/oo69/HereinHalifax/Img_0608.jpg>
>
> Fuel oil locally currently sells for $1.137 a litre and at 82% AFUE that
> puts the present cost of oil heat at 13-cents per kWh(e).  By comparison,
> our ductless units are heating our home at effectively 4-cents, or less
> than one-third this cost.
>
> I should note that our operating costs will creep closer to 5 or 6-cents
> as the heating season progresses and air temperatures continue to fall, but
> then they'll drift back down again as we move into the latter part of
> spring (our heating season along the coast basically stretches from October
> 1st through May 31st).  Of course anyone who heats with oil is painfully
> aware that oil prices also fluctuate in sympathy with the weather and in
> some parts of Canada folks are already paying as much as a $1.41 a litre.
>  Thus, a standard tank fill can set you back a cool $1,300.00 !  Nein danke.
>
> Cheers,
> Paul
>
>  Paul:
>>
>> These are great numbers. I've been doing some homework on these systems
>> for
>> a while. Does your heat pump incorporate "inverter" technology?
>>
>> Richard
>>
>>
>> ==============================**==============================
>> On Fri, Dec 2, 2011 at 9:10 PM, Paul Eldridge<paul.eldridge at
>> ns.sympatico.ca  <http://lists.bioenergylists.**org/mailman/listinfo/**
>> greenbuilding_lists.**bioenergylists.org<http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org>
>> >
>>
>>> /  wrote:
>>>
>> />
>
>> /  We have a forty-three year old, 2,500 sq. ft. Cape Cod and in past
>>> years
>>>
>> />>/  when we heated with oil exclusively, our fuel oil consumption
> averaged
> />>/  about 2,000 litres a year (space heating and domestic hot water).
>  Today,
> />>/  virtually all of our space heating needs are satisfied by two
> ductless heat
> />>/  pumps and our DHW is heated electrically.  Each of these loads is
> />>/  individually metered and a breakout of our consumption for November
> can be
> />>/  viewed at:
> />>/
> />>/  http://i362.photobucket.com/**albums/oo69/HereinHalifax/HP-**
> Nov2011.jpg<http://i362.photobucket.com/albums/oo69/HereinHalifax/HP-Nov2011.jpg> <
> http://i362.photobucket.com/****albums/oo69/HereinHalifax/HP-**
> **Nov2011.jpg%3Chttp://i362.**photobucket.com/albums/oo69/**
> HereinHalifax/HP-Nov2011.jpg<http://i362.photobucket.com/**albums/oo69/HereinHalifax/HP-**Nov2011.jpg%3Chttp://i362.photobucket.com/albums/oo69/HereinHalifax/HP-Nov2011.jpg>
> >
> />>/
> />>/  A summary of our heat pump savings for the months of October and
> November
> />>/  can be viewed at:
> />>/
> />>/  http://i362.photobucket.com/**albums/oo69/HereinHalifax/**ONHPR.jpg<http://i362.photobucket.com/albums/oo69/HereinHalifax/ONHPR.jpg> <
> http://i362.photobucket.com/****albums/oo69/HereinHalifax/****
> ONHPR.jpg%3Chttp://i362.**photobucket.com/albums/oo69/**
> HereinHalifax/ONHPR.jpg<http://i362.photobucket.com/**albums/oo69/HereinHalifax/**ONHPR.jpg%3Chttp://i362.photobucket.com/albums/oo69/HereinHalifax/ONHPR.jpg>
> >
> />>/
> />>/  For the first sixty-one days of this heating season (i.e., October
> 1st
> />>/  through November 30th), our heat pumps have consumed a combined
> total of
> />>/  498.6 kWh or an average of 8.2 kWh per day.  This is the energy
> equivalent
> />>/  of 0.93 litres or 0.25 US gallons of fuel oil a day at 82% AFUE and
> an
> />>/  indoor set temperature of 20°C.
> />>/
> />>/  Our goal this year is to get our total household consumption below
> the
> />>/  10,000 kWh mark which, if we should succeed, would put us in the
> range of
> />>/  43 kWh/m2.  In an effort to further minimize our ecological impact,
> 100 per
> />>/  cent of the electricity that we use is wind or low-impact hydro
> sourced
> />>/  through Bullfrog Power (http://www.bullfrogpower.com/****<http://www.bullfrogpower.com/**>
> ).
> />>/
> />>/  Cheers,
> />>/  Paul
> />>
>
>
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