OK, new thing to address in the Heat Pump Chronicles:
HVAC pros know a lot of stuff and have pretty elaborate mental frameworks of how things "should" be designed. And usually they're correct at least on a basic level.
For instance, you don't want to size a heat pump for heating load if you also plan to use it for cooling. If the heating load is bigger than the cooling load, this would result in short-cycling in the summer.
This is still true! But only with single-stage equipment.
