DEnd,
You might be right, but how did you come up with:
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Originally Posted by DEnd
Your existing heat exchange core is the best bang for the buck you can get.
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How do you know that to be true?
Quote:
Originally Posted by DEnd
You basically only have 23ºC of energy to harvest out of the out going indoor air.
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How did you come up with this? Heat pumps are able to scavenge energy when simple, passive heat exchange lack the delta-T to function effectively.
Quote:
Originally Posted by DEnd
A heat pump is not going to do this any more efficiently than your HRV core.
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How do you know that to be true? Do you have real examples or better yet, math that would indicate that this is the case?
Quote:
Originally Posted by DEnd
What you really need to do is add energy to the incoming air after it leaves the HRV. A heat pump pulling energy from outside the house is a great way to do this.
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You are probably thinking air-to-air heat pumps, which will not be very efficient where randen lives. As I write randon's location will be 17 F this evening.
However, he does have access to GSHP heat which would be useful, In your suggestion.
-AC