Re: showering for efficiency

Sometimes I do shower at school and when I do I make sure I enjoy a
long, long relaxing shower.  One advantage is you don't run out of hot
water like you do at home.  I don't save water when I shower.  I
tested it and found the shower water filled up the tub and sometimes
more than a regular bath.

I save on gas by turning the water heater and off just before a
shower.  It's a waste to have hot water 24/7 just to have a warm
shower once a day.  It also forces me to take shorter showers as the
hot water will run out if I didn't turn off the gas before showering. 
You do give up the option of having a hot shower on demand.

Don't know if the heating and cooling puts stress on the water heater
and shorten its life.