Jim Rosinski wrote:

The item in question appears to be an electric space heater you could
buy at Kmart, Target, etc. for $20, with a couple of hoses attached to
fit in the cowling of an airplane.

If it's really putting out air at 190 degrees, it's not any heater you can buy
at a retail outlet. A claim is also made that it has a thermostat that will
regulate the unit. The thermostats on typical heaters designed for home use
measure the ambient temperature of the air in the room, not the temperature of
the air flowing through the unit. This is, of course, a function of the location
of the thermostat, but someone had to do some design work here.

Seems to me to be somewhat more effort involved than just putting together a few
off-the-shelf parts.

George Patterson
He who marries for money earns every penny of it.