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On Thu, 22 Aug 2019 15:22:51 +1000, "Rod Speed"
wrote:



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On Wed, 21 Aug 2019 19:05:44 -0500, Arthur Conan Doyle
wrote:

Ralph Mowery wrote:

For heat pumps you can say that electricity is more than 100%
efficient.

The heat transfered from the outside is more than the heat produced by
electricity if used as resistance heating.

True. However, heat pumps are decidedly more expensive than conventional
furnaces to install and maintain, so that does need to be considered.

If you live in a place where heat pumps actually work, you probably
have an A/C anyway. The incremental cost for the reversing valve is
minimal.

There's more involved than just a reversing valve.

But the incremental cost on the line is minimal.

It isnt just the line, it's the other stuff too, and the cost isnt minimal.

Just because of the economy of scale most small HVAC systems might
be heat pump by default and it is the special order to delete it.

That's bull**** too.

It is getting that way with mini splits here now.

Bull**** it is. And they arent the low end of HVAC anyway.