Wednesday, July 12, 2006

Low Termperature Air Sourced Heat Pumps

I am very interested in heat pumps that for meeting building heating (and cooling) needs here in the cold and cloudy winter climate. Several blog posts cover ground sourced heat pumps (GSHPs)... which are widely available and been sold for a couple of decades.

Basically I am very worried about the future cost of natural gas and global climate change... as well as an expanding trade deficit as we import more natural gas. And lastly the ports needed to import liquefied natural gas are vulnerable to hurricanes.

Heat pumps are the most efficient electric means of space heating. In our, Wisconsin, climate normal air sourced heat pumps loss their efficiency when you get near freezing.

There is a new option.. and it is just entering the market: Low Temperature Air Sourced Heat Pumps. Apparently they have a coefficient of performance (COP) of 2.23 at zero degrees F (unlike an air sourced unit that has a COP of ~1).

Here is a great link for more information from the Architectural record

"It does seem like they are poised to hit the market. If and when they do, it seems to me it could really hurt the GSHP market, since they will no doubt cost considerably less." (quote from Scott Pigg of the Energy Center of Wisconsin.) No ground loop would be needed.

Their inventor as a company that just started selling them on June 19th.
Clearly a new webpage... it has some interesting test result data.

Hey you HVAC contractors - perhaps you should consider becoming a distributor?

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