[Greenbuilding] Ductless Heat Pumps (was Central vs window AC)

[Gennaro]

Show off.

Gennaro Brooks-Church
347-244-3016
Sent from my phone
On Jun 9, 2012 12:34 PM, "Paul Eldridge" <paul.eldridge at ns.sympatico.ca>
wrote:

> We have two Sanyo inverter-drive ductless heat pumps in our home, a
> forty-four year old, 2,500 sq. foot Cape Cod, and they satisfy just about
> all of our space heating needs (we have an oil-fired boiler for backup
> heat, but haven't required its services for the past two winters).  Our
> local climate is notably colder than that of Buffalo, NY and between
> October 1st and May 31st of this year they consumed a combined total of
> 3,830 kWh and, in return, supplied us with an estimated 10,032 kWh of space
> heat, for a seasonal COP of 2.62.
>
> Our cooling requirements are rather modest (e.g., our forecast high for
> today is 13°C), but during the hottest days of the year we'll run our lower
> level unit in "dry" mode to remove excess humidity (the relative humidity
> as I type this is 97%).  It's much quieter than our portable dehumidifier,
> it uses far less energy and we don't need to empty a bucket every other day
> -- for the other ten or so months of the year, we leave the heat turned on
> to help keep mould and mildew at bay.  One additional benefit: the
> electricity that we use is 100 per cent wind and low-impact hydro supplied
> by Bullfrog Power, which makes their operation, for all intents and
> purposes, carbon-neutral.
>
> Our summary data for the 2011/2012 heating season can be found at:
> http://i362.photobucket.com/**albums/oo69/HereinHalifax/HP-**2011-2012.jpg<http://i362.photobucket.com/albums/oo69/HereinHalifax/HP-2011-2012.jpg>
>
> Cheers,
> Paul
>
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