Programmable thermostats now come in many varieties. They can allow for either one or two adjustments a day or multiple changes over a week. To decide the best thermostat for your needs, determine what temperature set backs you want for your home and look for the simplest thermostat that will meet your individual needs. If you have a heat pump system, you should review the manufacturer's specifications before considering a programmable thermostat. An improperly used or mismatched setback thermostat can actually increase heat pump operating costs.
Most manufacturers now offer programmable thermostats specifically designed for heat pumps.
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