[Greenbuilding] Steam Shower?

[nick pine]

A fully-enclosed shower like this: 
http://www.sunfrost.com/efficient_shower.html
with a 5'x8' R2 20 Btu/h-F front door and 82 ft^2 of R10 8.2 Btu/h-F 
enclosure
could be 120 F with (120-70)28.2 = 1410 Btu/h, ie 413 watts of steam from
a  $50 Ranco ETC 111000 digital thermostat and a 1500 watt coffee urn with
the thermostat bypassed and a 1/4" polypropylene tube from the urn to the 
tub
and another tube from a toilet tank to keep the urn full, to make a steam 
shower
with the tub empty or a hot soaking tub with the tub full.

Nick