m Ransley wrote:

I used to use 26-30 a month for Ng for cooking, HW and dryer in summer
with a tank, now I use 6$ Ng a month in summer, cooking and dryer use
have not changed, standby loss and heating 40 gallons cost is greater
than you think.

A comparison chart on the Bosch site:

http://www.boschho****er.com/StartPa...9/Default.aspx

Shows a pretty large difference between tank and tankless for gas water
heaters.

For the electric however:

http://www.boschho****er.com/StartPa...9/Default.aspx

There is very little difference. It would appear that stack losses from
the tank type gas heater are the largest factor. Heating a large volume
of water isn't an issue when you can insulate it well as in the electric
models.

Pete C.