Actually, the idea of having a vehicle with a windscreen/windshield in a damp climate without some means of keeping it free of condensation is pretty scary - so that legislation kind of make sense (at least for Northern Europe).
oh... don't get me wrong. I understand the usefulness of having a good heater when it is raining. Likewise I understand the horror of having an inefficient heater when it is raining. It was just interesting that there is legislation mandating it. I'll assume that the US has this as well then.
