Honeywell Programmable Thermostat Owner's Manual page 6

Your new thermostat is so smart,
it's almost human.
PROGRAMMED RECOVERY
Your body perceives temperature from a variety of sources, not only
from the air in the room, but also from your surroundings—walls,
windows and furnishings.
Human beings feel differences in temperature as slight as one
degree Celsius.
Common household thermometers and standard thermostats sense
only air temperature, which may or may not reflect how hot or cold
the room actually feels to a human being.
Your new thermostat reads the temperature of the wall as well as the
air—and responds to temperature changes as little as one-half
degree Celsius—so room temperature is more likely to "feel right" to
you and your family.
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