Venting Water Heater Through Roof

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.

Venting water heater through roof.

Direct vent water heaters. With a direct vent system air for combustion is drawn from a vent pipe that runs through an exterior wall or the roof. How to vent a gas water heater through the roof 1. In the attic use the plumb bob to mark the center of the hole to be cut for the roof.

The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof. Other issue is the bathroom installation which isn t permitted as well unless the water heater closet is sealed from the bathroom area air tight doors and it has a separate fresh air supply from exterior or other areas of the house that can be used for this purpose. 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 that. Mark the ceiling above the water heater to receive the pipe.

Position the vent pipe up to the bottom of the roof. Tankless water heaters use fans to blow exhaust from the unit horizontally allowing vents to terminate on the side of a house. Go into your attic. One on the ceiling above the water heater and one that is the distance from the attic floor to the roof.

This will allow your water heater to operate efficiently and effectively and most significantly it will avoid any probability of danger and therefore the risk of carbon monoxide gas poisoning. Illustrations of proper gas fired water heater venting using type b double wall vent pipe through a roof above or through a chimney below include details for the flue vent connector such as the requirement of a minimum vent connector upwards slope of 1 4 per foot of horizontal run. With the pipe in a vertical position trace around the pipe using a pencil. In order to do this two critical measurements must be taken.

Use a plumb bob to be sure the center of the tube at the. If it is a natural vent type water heater you can not vent it through the side wall it has to vent above the roof. Traditional gas tank water heater require venting through the roof. Tankless water heaters can vent through the roof or a side wall creating more flexibility and options for placement.