[Greenbuilding] Steam Shower?

[Stewart Abbey]

I'm a bit late on this one but here is my experience.
The plumber hooked up our steam shower to be fed by cold water. 
Obviously the energy is the same to heat the water to steam with 
electricity from the hot water tank or with electricity from the steam 
generator.  The difference in my case was the steam cycled off about 15 
seconds per minute while it heated the water from the cold water line.
I have since fed the steam generator with water from the hot water line 
and it only cycles
off about 2 or 3 seconds per minute, a dramatic improvement in warm up time.
As I will never use the steam shower in non spaceheating seasons, 
virtually all the energy used is returned to the house as heat.  It 
makes good double use of the shower space compared to a sauna which 
would have required a dedicated space.
Our generator is a Mr. Steam 8kw I think.

Thank-you for all the great advice on this list.
Stewart Abbey