On my way into work this morning at 4* F in freezing fog that was precipitating (that means it was snowing, but the radar couldn't detect it and it doesn't really accumulate), I wondered how a hybrid or electic vehicle gets the heat for the passenger compartment. Does anyone know? Also, how does this solution work in the brutally cold weather that our intermountain west location of Southwestern Idaho is currently experiencing (lows close to 0 and highs only to about 20 for the last two weeks)? Is there any heating performance to be considered of other vehicles with the 'start/stop' feature? This is a pragmatic consideration as my wife and I are now looking into what general type of vehicle we will replace her '00 e39 5er in a couple of years.