From: Heat Stage 1 suddenly became Aux Heat in Thermostat Summary - Bug Reports - beestat community
For a heat pump, ecobee reports heating data in two columns:
compressor
andaux
. The compressor column represents compressor runtime, and the aux represents aux runtime. Simple.
For non-heat-pumps, ecobee reports heating data in one column:aux
. This is a little bit confusing, but the aux column generally just represents heat generated at the furnace (heat strips, gas, whatever).
My gas furnace died, and I replaced it (and the A/C) with a heat pump with auxiliary resistance heat. Beestat’s Thermostat Summary thinks I have always had a heat pump. You can see the gap where we had no furnace for a week (in winter! in Chicago!). Before that should be Stage 1 and 2 heat (orange), but it’s Stage 1 (orange), Aux 1 (red), and Aux 2 (dark red). Obviously, this is quite the edge case, but I thought I’d mention it.