#winter #cold #heating #questions :)

[Idahotom]

Look at all the big rigs that have those covers over their grills, they have thermostats also.

Not cold weather related, but some feel partially blocking off the grill means less cooling drag/better economy. I understand some of the newer cars have automatic louvers to accomplish this. So, in very cold weather I keep things cozier and maybe gain some FE.

Cooling drag is often overlooked, but not in airplanes, the fast ones use the absolute minimum cowl openings to deal with the heat, smaller is always better, performance wise. The same principle applies to cars, even a Yaris. A system that would clean up and close up the undercarriage and the grill openings, and automatically open up as cooling requirements rise would for sure be more efficient, and also for sure, add weight and complexity.