coalkirk wrote:At the temperature you have now (16) and falling, you should turn the heat pump thermostat to emergency heat. In regular heat mode I can't believe the compressor is sending you any heat. You're only getting heat from the auxilairy strip heater. Better to not waste the juice that the compressor is using and send it the the second strip heater. (emergency heat).
I have done that on occasion (like the 1994 subzero spell that went on for about 10 days), and got grossly increased elec bill those months. My experience is, I do better in the long haul just letting the HP run, pulling the heat in from the coal stove, and then cutting the backup heat in when it thinks it's needed.
My system has an old, dual-bulb thermostat, with the second bulb controlling the backup resistance heat. I can remove the thermostat cover and see if the backup heat is being called via the state of the second bulb. So far tonight (7* out as of 11:30 pm) the HP is still cycling on and off without the backup heat kicking in. Wouldn't be surprised if it starts calling for some backup heat in the wee hours.
This will be my last year for the electric backup heat in any case. I'm due for a new heating system next year. Looking at a high SEER heat pump with a propane furnace as backup. We don't have natural gas lines in our area, and I don't like oil.