one reason these work in aircraft is it's often only the half hour or so of
taxiing and getting to altitude where climate control is a major problem,
after that air temperatures fall significantly.

> http://www.sportys.com/PilotShop/product/16540/
>
> My '81 Vanagon Westy doesn't have AC and to put one in, would take hp
> away from the engine......
>