Although night setback is recommended during the winter for most types of heating system to save and reduce costs, it is generally not recommended for a heat pump unless you're using a programmable thermostat designed expressly for use with a heat pump is used. When you have a heat pump and raise the house temperature in the morning, the supplementary heat may come on using more electricity than you saved during the night. It is a good idea to reduce the thermostat temperature settings for weekend trips or vacations during the heating season.
The use of a standard automatic nighttime setback control with a heat pump is not recommended. Many manufactures now provide programmable thermostats designed for night setback so that the supplementary heaters will not normally be energized during the time that the heating system is recovering.
Do not block registers and return grills with furniture, draperies, or rugs. Although cutting off heat to unused rooms is frequently suggested as a conservation measure, we recommend that all supply registers for a heat pump be left open. The system is designed to heat or cool a specific space. If air circulation is reduced drastically, the compressor may be damaged.
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