We're having a lot of old pipe replaced, and the plumber thinks we should put in a tankless water heater while we're at it. I would like to free up the space in the utility room, so I'm good with the idea. Currently we have a 40 gallon gas water heater which works fine and we never run out of hot water. THe plumber says we should go for an electric tankless. Ironically, the electrician thinks we should go with gas. What are the advantages/disadvantages of each as far as function goes? (Not counting in initial costs) Thanks.