Mercury is the followed room; the heater flares on a heat turn.
Temperature — the bang-bang sawtooth
One line per room, drawn as it is logged. Heat fires when a line touches the
20° threshold; the weather then drains it back down — a
mean-reverting sawtooth that hugs the 19–22° comfort band.
comfort band 19–22°heat threshold 20°cold startwarm startspace play · ←→ step