I also was going to suggest the Honeywell VisionPro series. They
have many programmable options for use with various systems and I bet
if the OP looks at the manual which is available online, he'll find
that it has choices of when and when not to use aux heat. They are
also adaptive, meaning you just set them for the temp you want and it
figures out how to get the house to that temp at the given time.
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