Unlike baseboard heaters, the thermostat for a central heat pump should be set at a comfortable setting and not readjusted. This is because frequent temperature adjustments will increase the use of the less efficient backup electric resistance heating system, reducing overall system efficiency.
A ductless mini split system can be set back at night or during the work day if the home is vacant for an extended period of time as it does not have a built in, back up heating system. Just ensure your original heating system – be it electric baseboards or oil heat – is on a lower temperature setting than the heat pump.