Honeywell T8665C EnergyPro Owner's Manual page 73

reads both the temperature of the wall and in
the air, and responds to temperature changes
as little as one degree Fahrenheit, so room
temperature is more likely to feel right to you
and your family.
The thermostat acts like a computer. When
calculating the time to turn on your heating or
cooling system, it considers air temperature,
wall temperature, and the time you want to
reach the comfort temperature. After
considering these three things, Adaptive
Intelligent Recovery™ control gradually
changes the temperature from the energy
savings setting to the comfort setting (for
example, from a heating temperature of 62° at
night to 70° in the morning).
The system runs continuously until the comfort
temperature you choose is reached without
overshooting the setting. This saves energy.
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