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Reply to "Dual fuel (heat pump with auxiliary gas furnace) - what settings for maximum efficiency and/or cost savings?"
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[quote=Anonymous]We got a heat pump (a Lennox XP20) with an auxiliary gas furnace this year and I'm a little unclear on the following: 1. In the winter, should we keep the temperature exactly the same throughout the day and night? Or can we lower it a couple degrees overnight/during the workday? 2. The default settings are for the furnace to start "helping" the heat pump when the temp drops below 50 degrees and for the furnace to work on its own below 25 degrees. Do people just use trial and error to figure out the best settings? 3. In the summer, if a heat pump is in cooling mode can we use it like a regular AC (e.g. turn it off or turn up the thermostat when we are not home)?[/quote]
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