Love my Bosch heat pump. I noticed when I got rid of solo heater coils for this new air handler and pump was that it managed to keep the air temperature more consistent.<p>What has helped the most however was adding in a humidifier. Dry desert air is unforgiving and adding in water to the air made a huge difference in comfort. 68* F with 40% humidity is much more comfortable than the same with 5%.
To save someone else the time spent looking:<p>The data recording setup they are typically using only works for air-to-water heat pumps, like you might use to heat water for radiators. They rely on a 'heat meter' that measures the water flow rate and temperature.<p>Typical setup: <a href="https://shop.openenergymonitor.com/level-3-heat-pump-monitoring-bundle-emonhp/" rel="nofollow">https://shop.openenergymonitor.com/level-3-heat-pump-monitor...</a><p>If your system is a typical US air-to-air 'split' system, you probably have a long loop of refrigerant in a pressurized tube to carry the heat. To measure efficiency, I think you either need to measure air flow accurately inside or outside, or measure refrigerant flow rate. Either one harder than the commercial meter for hot water.<p>So, no easy drop-in COP measurement for me.
> It only takes a little electricity to power this process, which can raise the refrigerant’s temperature by many degrees Celsius.<p>And the same electricity can raise the temperature by <i>even more</i> degrees Fahrenheit!