backup heat for heat pump

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Hi All,

I'm having trouble with the backup heat for heat pumps in heating mode (used
with air-source heat pumps in heating mode). The program allows you to
select a number of options (furnace, HW, etc), but it seems that only
electric resistance works.

Am I missing something?

Thanks,

--
Karen

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Joined: 2011-09-30
Reputation: 200