On Mar 19, 8:12*am, " wrote:
on a tankless feeding a regular tank, it should cost no more to
operate than a regular hot water tank.

Maybe not, but is sure costs a lot more in terms of buying and
installing 2 water heaters, one of which is tankless and more
expensive. With this approach, you incur the higher cost of tankless
and by having the second regular tank, you still have the standby
losses, which defeat most of the advantage of the tankless that
justify it's expense. I fail to see the point. Plenty of folks
have a gas tankless for their whole house needs and are happy with it.





the tankless initially heats the water to whatever it can, then sends
the water to a regular tank that does its normal job.

endless hot water regular tank conveniences and the only extra cost is
the line between the tankless and regular tank, ideally it should be
short and well insulated.

true the tank will have normal tank losses.

today i have to stop at home depot and while i am there price some hot
water tanks. just to verify some of these issues