In article op.z92yo9yfwdg98l@glass, says...

I assume what Danny was saying is if running it on full blast, then the coils themselves will get very cold and hot, hence make it run less efficiently. Best to run a big engine slowly than a little engine fast - Top Gear (a UK motoring program) ran a test where a Toyota Prius drove as fast as possible round a race track, and a
large BMW followed it. The BMW used less fuel!



Most home units are very simple. The cooling and heating 'coils' are
either off or on. Just like most electric stoves. The only way to vary
the ammount of heat/cool is to cycle them off and on.

There may be some newer units out that do vary the ammount of heat/cool
in the coils, but that cost more and most do not want to buy them.