Always noticed the Fords I've been in have strong heat. GMs IMO have the best AC -when their compressors aren't turned into smithereens.
Toyotas aren't slouches either - especially the Prius. Prii use a thermos to hold warm coolant on the 2002-2009 cars and a exhaust heat recovery system on the 2010-current cars. The goal is to reduce hydrocarbon emissions from a cold start, but it also helps preheat the cooling system. There are also two PTC elements in the heater core, which help keep the cabin warm when the ICE isn't running.
Originally Posted by 69Torino
School buses. School buses seem like they never heat up. Especially the ones that have had the booster pumps removed, so there is 80 feet of heater hoses that go to two or three cheap floor heaters, pushed only by the engine water pump. By the time the coolant reaches them it's tepid again. MAYBE on a field trip the bus will actually be warm inside, but never really get warm on a daily route. In the winter, below 20 degrees, we have what's called the "cold crew". Mechanics and drivers come in about 4AM and start 150 buses. About 10% must be jumped and probably 25% need ether. Last winter was miserable, some mornings less than -10 degrees. The buses never fully heated up through morning routes.
I was under the impression school buses operating in the Rust Belt have block heaters or auxillary heaters like a Webasto? Here in a more temperate part of California, the two major transit agencies didn't order AC with their buses until OSHA came down on one and the other saw adding on all-electric HVAC on their hybrid buses and their newest trolley fleet as chump change. One thing I will say, even on a "cold" San Francisco night in the low 40s, those buses had strong heat. Since both of them now order Thermo King bus HVAC, they don't use baseboard heaters with booster pumps but pipe hot coolant into the coil/fan units.