That's a pretty normal feature of modern heat pumps and thermostats. It is made possible/practical/economical by ECM blowers (electronically commutated motors). The electrical draw in the lowest speed mode is maybe 25 watts or so.
The idea is that the operation of the blower provides air filtering and "de-stratification". By moving the air around the house, even though there's no call for heat, isolated cold and warm spots are reduced.
The feature should be optional, and controllable by the thermostat. If the circulating mode bugs you, you can set it up to run only when there's a call for heat by changing the programming of the thermostat.
The thermostat I installed in my own house has an additional option -- in the "circ" mode the blower can be programmed to turn on and off randomly (it is on about 1/3 of the time when there is no call for heat). This garners most of the benefit of the circ mode while reducing fan-related energy use by 2/3 -- down to about the same as that of an electric clock.
Add this to three stages of heat and two stages of cooling, with blower speeds appropriate for each mode, and it has proved a quiet, efficient, effective setup.
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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