best way to warm a minivan ?

[davester]

Filliam H. Muffman wrote:
The reflective films that go up in the attic are generally laid across the top of the insulation, so they are several feet away from the object radiating heat.

The preferred location to put them is stapled up to the rafters. However, since the roof (i.e. the radiant object) is planar, and has an area larger than the floor of the attic, the heat has nowhere to dissipate to which is why the reflector is still effective if it is on the attic floor. The amount of heat radiating down from a heated roof is also absolutely enormous in comparison to the amount of heat beaming off of a human body.