What does HP-01 mean?
Electric resistance / auxiliary heat runs while it is warm enough for the compressor to carry the load.
Why does it matter?
Resistance heat costs about three times heat-pump heat; a missing lockout is one of the largest single wastes on a heat pump.
What should you do?
Set an outdoor lockout for auxiliary heat (typically 30–40 °F), check the balance point and the thermostat staging.
How Energy Agent prices a finding
Written by Pelorus Engineering · Brent Waluzak, P.E. (FL), President, Pelorus EngineeringLast updated