We have had s many as thirty in stock at a time in our warehouse.
Gas waterheaters (natural gas or propane) Are atmospheric vented models, this means that they use galvanized vent pipe that is piped right into a chimney
Power-vent waterheaters Same as atmospheric model, but with a redesigned exhaust system. The outlet is made of PVC instead of metal and has a blower (black motor at the top) to help remove combustion by-products and can be drained through the roof or side walls without a chimney.
Electric waterheaters are like the name of the state … they must have an electrical cord connected to the top of the heater. They would also have one or two access doors (as shown in the picture) on the front of the unit.