Just curious to know when you turn on the ECO mode for heat does it provide instantaneous heat? So if you get in the car first thing in the morning and start the heat in ECO mode how long does it take to get hot? Or does it work similar to the heat that runs off the ICE (take a while to heat up)?

Sorry if this is a dumb question as I don't completely understand the ECO mode for heating and A/C. My understanding is when in ECO mode the heat and A/C is running/powered by the batter?