Quote:
Originally Posted by ditka41
For reasons known only to the designer / builder, the tank is mounted on the outside of the garage wall and just as far as possible from where we use the hot water.
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The reason it is placed there is it needs a 3/4" gas line. It is placed next to, or near the gas meter. A traditional heater uses a 1/2" line. It is cheaper to run water lines to it than a gas line inside the home. The venting is also an issue. These heaters use expensive vent pipes, far more expensive than the vent pipe that a traditional hot water heater uses. If it is placed outside it does not have any vent pipe at all, it vents directly to the atmosphere.