Also, there are changes in SEER ratings and a new round of refrigerant phase outs coming starting in January. Do your homework if you are in the market for a new unit, and have a defibrillator handy for when you get the price.
If you have an older single speed heat pump make sure the thermostat is set to allow the heat pump to run when the aux heat is on.Yeah, I attended a seminar at a Supply House showing off Bosch units. Very impressive. IIRC they ran down to 5F before calling for auxiliary heat.
20k Watts would need 80Amps. 2k is more like it.Check your numbers, you couldn't make toast on that (most hair driers run 1200-1400 watts on hi). 750 watts would raise air temp about 2 degrees with a typical CFM air flow. The smallest residential heat strips are around 5 Kilowatts each, and you would normally want at least 2 of those, larger ones are usually 2-4 of them wired together, normally up to 20k.
Supplyhouse.com rules by the way.