Dairy Barn. This 80-gallon electric water heater is equipped with two heating elements, with thermostats that are adjustable through a range of 140º to 181ºF, to provide sanitizing hot water required in a dairy barn environment. It is also shipped with a base with 4" legs, to raise the water heater off the floor to simplify and maintain. With residential water heaters alone, Lochinvar offers 14 categories of gas and electric water heaters. Choose a capacity that meets your needs, gas or electric powered, with or without a tank. Cogeneration — This revolutionary product allows you to heat a premises and generate surplus electricity at the same time.