Christian McArdle wrote:

snip

Mine has a nighttime and daytime temperature and will estimate how long
it takes to warm the house up depending on the current temperature and
turn on at just the right time. This isn't possible with a separate
programmer, where you have to set it back manually by an hour or two and
probably overestimate the time required to warm up sometimes and
underestimate at others.

What make and model thermostat/programmer is that?

Regards
Paul