A heat pump runs most efficiently when the output is as cold as possible
while still heating the house, so the air coming out of the registers
should feel cold. If you measure its temp, it's warmer than the room.
That's what you need.

The airflow is kept very high to achieve this - essentially cooling
the indoor coil with indoor air so it never gets hot.

As the outdoor air temp drops, the heat pump does less and less work,
and achieves less and less heating; at the same time, the cost to
run it drops, so in effect you fall back on resistive heating without
any loss of money. In the circumstance where the heat pump no longer
holds the house, it will run continuously (not achieving much) while
the resistive strips kick in and out.

If the heat pump is broken in some way, say constant defrosting,
then this continuous running costs you money. If not, then it's
just the way heat pumps are.

Women like warm toasty air coming out of the ducts. Heat pumps
don't do that. Guys see the method in it and put up with it.
--
Ron Hardin


On the internet, nobody knows you're a jerk.