Okay, here is a simple question for someone:
How do the heaters work on modern buses, such as, for example, a Scania K230UB Custom Coaches "CB60 Evo II" ??
(1) do they rely on engine heat, or do they operate independently of engine heat? ; and
(2) do rev levels have anything to do with it - eg, would low rev level affect it? ; and
(3) where does the demister source its heat from?
Thanks in advance.