3 ms·
Do heat pumps not just work in an "on/off" fashion that shut off when the thermostat say "ok, that's enough"? I know that modern forced air natural gas furnace
by SketchySeaBeast 4y ago
Do heat pumps not just work in an "on/off" fashion that shut off when the thermostat say "ok, that's enough"? I know that modern forced air natural gas furnaces are a little smarter and will have stages to balance for noise, but they are really just "on" or "off", pushing much hotter than ambient air around until the rooms settle to the desired temperature.
- sokoloff 4y agoMost heat pumps now are variable speed/output. I suspect all low-outside temp capable heat pumps are variable speed/inverter drive.
- SketchySeaBeast 4y agoIs the speed/output a high/medium/low type deal or a specific temperature?
- sokoloff 4y agoThe outdoor unit can vary the frequency of the compressor drive to track a desired refrigerant temperature in the face of varying load from the indoor unit. As the indoor air comes closer to the desired temperature, it will cool off the returning refrigerant less than when there is a large delta-T. The outdoor unit can adjust the compressor speed to closely match the heat transfer and run continuously at a lower speed rather than cycling on/off. There is a minimum speed below which the compressor can't run [and so would have to cycle], but in general the outside unit is smoothly variable. The indoor unit fan speeds are only loosely connected to this. (The higher the indoor fan speed, the greater the heat transfer and load on the compressor, all else being equal.)