ramone:
When did they first start fitting cab heaters to buses , not the passenger compartment just the cab ?
When i joined Birmingham City Transport in 1957, the buses in service then had a cab heater of sorts.
It was a bit like a miniature radiator attached to the front panel in front of the steering column,
a double S shaped copper pipe with a on/off tap. In a small half cab with the engine along side i guess it
was reasonably efficient.