"Mark" wrote in message
...
IMM typed:

FFS how many showers do you people have a day.
Has anyone given the slightest thought to how efficient this will
be, and the likely rise in temperature achievable.
Even I cant be bothered to build one of these.

Another know-it-all. Do a Google on groups and type in gfx. If you
did that first you wouldn't nake such an idiot of yourself. There
are some Americans who have these installed and reported figures on
them. The average temp rise is 17C.

Must be

Even the US government is on about it.

http://www.eere.energy.gov/femp/pdfs...ty_film_ex.pdf