[Greenbuilding] Ductless Heat Pump Performance - November 2011
richard6 at gmail.com
Sat Dec 3 15:11:16 PST 2011
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!
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:
> You can view our main floor indoor air handler at:
> 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.
>> These are great numbers. I've been doing some homework on these systems
>> a while. Does your heat pump incorporate "inverter" technology?
>> On Fri, Dec 2, 2011 at 9:10 PM, Paul Eldridge<paul.eldridge at
>> ns.sympatico.ca <http://lists.bioenergylists.**org/mailman/listinfo/**
>>> / wrote:
>> / We have a forty-three year old, 2,500 sq. ft. Cape Cod and in past
>> />>/ when we heated with oil exclusively, our fuel oil consumption
> />>/ about 2,000 litres a year (space heating and domestic hot water).
> />>/ 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> <
> />>/ A summary of our heat pump savings for the months of October and
> />>/ can be viewed at:
> />>/ http://i362.photobucket.com/**albums/oo69/HereinHalifax/**ONHPR.jpg<http://i362.photobucket.com/albums/oo69/HereinHalifax/ONHPR.jpg> <
> />>/ For the first sixty-one days of this heating season (i.e., October
> />>/ 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
> />>/ of 0.93 litres or 0.25 US gallons of fuel oil a day at 82% AFUE and
> />>/ indoor set temperature of 20°C.
> />>/ Our goal this year is to get our total household consumption below
> />>/ 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
> />>/ through Bullfrog Power (http://www.bullfrogpower.com/****<http://www.bullfrogpower.com/**>
> />>/ Cheers,
> />>/ Paul
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