Please ignore my spelling mistakes
I'm wondering if you can draw a correllation between a heat pump effectiveness and the temp of the air coming out of the register.
I don't know the exact temp tonight, but it was +-30 degrees
The house was 64, so I changed the set point to 70. The heat pump kicked on and the air coming out of the register I tested was 81 degrees. I saw the temp change to 66 in an hour or two. I then kicked over to heat strips and upped the stat to 72. It went from 66 to 72 within an hour (or something like that...it was fast).
I'm guessing the heat strips use 2-4 times the electricity of a heat pump, but I'm also guessing that in colder temps there becomes a point where heat pump efficiency equals heat strip efficiency, then the heat pump becomes less efficient as it gets colder.
Is there a general rule of thumb as to when you should kick over to heat strips (I've heard 30 degrees)?
And can it be tied to the air temp coming out of the registers?
Thanks in advance