Are you considering replacing your tank model water heater? The guys at This Old House explain how to install a tankless water heater.
Gary Smith says the new water heaters have to accommodate the higher insulation r-values (thermal resistance), making the water heater taller and wider.
Nothing beats a nice clean cool drink of water. However, if you own a tankless water heater, you’ll want to keep the heat exchanger free of lime and scale. You should flush it annually. Here are some basic steps. The pump and hoses will cost less than $100.