I heat my water for washing with natural gas. I have both a tank type
water heater and a tankless water heater. They both sit in the
basement under my living room. I can easily switch to either using one
of them or both of them to heat my water. During the summer the
tankless is sufficient for my needs but not in the winter when the
incoming water is very cold. Does it pay to completely drain the tank
heater during the warmer months of the year when I will not use it or
will it corrode more than with water in it?
Richard