Venting A Gas Water Heater Through Wall

The buyer wants to replace the electric water heater with gas.

Venting a gas water heater through wall.

I recently inspected a split level home with a utility room that includes a 90 efficiency furnace and an electric water heater. Atmospheric venting refers to a system in which exhaust from the water heater naturally rises out of the appliance s combustion chamber then travels up through a standard chimney style flue. With a direct vent system air for combustion is drawn from a vent pipe that runs through an exterior wall or the roof. The direct vent water boiler is another type of water heater venting that you should know about.

Also you need to be aware of combustion air intake requirements for any type of heater. Likely it would have to be some specific minimum distance from any. The air that is used for combustion will come from the water vent this vent will either through the roof or from the outside of the wall. And if he vents it through a side wall what would be the considerations.

Exhaust gases are vented outdoors through a separate vent duct or through a separate chamber of the same pipe this requires a double wall vent duct. This vent also allows for off gasses to be unleashed outside too. The question is does it have to vent through the roof.