Hi Collette,Thanks for sharing this info... Do you have the model of the heat pump you're running at your house? I find it very interesting that it can hold a COP so steady around 5 with such a wide outdoor temperature swing. Is it underground? My heat pump is ~5 years old, and not by any means the most expensive. It's specs between 10F and -5F go from 2.06 to 1.24. Are you sure you're getting a COP of around 5 from 10F to -13F? I plug my cost for electricity and propane into a DOE calculator each year to figure out when to set my heat-pump to turn-off and the propane furnace to kick on. If I could get a COP of 5... I'd never need propane. :-)
Just curious.
Thanks,Scott
On Monday, 6 February 2023 at 08:46:01 am GMT-5, Cj Sizer
<cjsi...@gmail.com> wrote:
Hi Rich,
My husband kept data on our system through the bitter weather. He made a ppt
for CFREE (working group of the Green Energy Committee). You might find it
interesting, Our heat pump is located in a nook on the southeast side of the
house. The area warms when the sun comes up. We added insulation when we
replaced our roof last year. We also replaced many of our single-pane windows
with triple pane. These things surely helped keep our energy usage down through
the cold wave. In the coldest hours of the early morning, the heat pump held
the temperature 1° below the thermostat setting.
Best regards,Collette
On Sun, Feb 5, 2023 at 11:42 AM Rich Rosenbaum <s...@bcdef.com> wrote:
I was wondering how people with air-to-air heat exchangers managed during our
very cold night.
Rich
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heatcalculatorMEv3_2.xlsx
Description: MS-Excel 2007 spreadsheet
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