Also, both the heat pump and the electric backup run on very short cycles. The Eco Temperature ranges you can choose from … ft. house heated by two electric heat pumps with an electric coil backup. I want to use the Heat pump as much as possible. What temp should the compressor lockout be set? For heatpump systems, its also crucial to know and set the minimum outdoor temperature that the heat pump can run with - otherwise the thermostat will lock out the heatpump and change over to aux heat as the weather outside will be too cold to run the heatpump unit that's sitting outside. Final Thoughts: At What Temperature is a Heat Pump Not Effective? I just had a new Bryant heat pump and propane furnance installed. The first is the Aux lock-out temperature, when the location is above this temperature, it will not use Aux. Hello. The Nest thermostat is compatible with these systems and supports up to 2 alternate heat sources. If the customer has a heat pump system, they can change the lockout temperature on the thermostat. I got several answers to this question during the bid process. You can tell your Nest Thermostat exactly when it should turn on and at what temperature it should cool your house to. When I moved in, the heat pump compressor lockout (thermostat setting 0350) was set at 35 degrees. Nest 3rd gen model will turn ON the aux heat system only when it is necessary (only when the outside temperature falls below the aux heat lockout temperature). Hopefully this article has helped answer that question, and any others about heat pump temperature ranges, and what you can do to improve heat pump performance when it gets below 25-30 degrees. Instead of generating higher-temperature heat in intermittent blasts, heat pumps generate lower-temperature heat continuously. The installer set it at 40 which seemed high to me. Please click on this link to know more about this. Now I am wondering if it may be costing us more money than we are saving. Heat pumps look similar to air conditioners, so check the label on your outdoor unit to make sure it’s a heat pump. We have a 4,000 sq. You have a dual fuel system if you have a furnace inside of your home, and a heat pump on the outside of your home. While the Nest will learn your habits over time, many people prefer to have mostly-full control over the temperature of their living space. An air-source heat pump releases air that's in … Your Nest Thermostat will automatically switch to Eco Temperatures when nobody's home. By default Nest will activate the heat pump balance, which then automatically determines the aux heat lockout temperature. By default, Nest will lock out the Setting compressor and auxiliary heater when the outdoor temperature is above 50°F but will not lock out auxiliary lockout temperatures the compressor at any temperature. After the installation, the Nest thermostat won't let you test the cooling if outside temp is below 60F. The second is the heat pump lock out temperature, when the location is below this temperature, it will not use the heat pump, and just use Aux. Generally speaking, a natural gas furnace will release heat that's at least 120 degrees. Air-source heat pumps work on a novel principle: instead of directly producing the heat that you need to keep warm through the winter, the heat pump will find heat energy in the outside air and bring it into your home, using refrigerant as the medium of heat exchange.. For the more old school among you, setting a schedule is a good option. I understand that in a typical operation, when the outside temperature goes low enough, the heat pump cannot produce much heat. Whenever you see a green leaf and Eco on your Nest Thermostat or Nest app that means you are saving energy! 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