Water Heater Venting Through Roof

How to vent a gas water heater through the roof 1.

Water heater venting through roof.

When installing a gas water heater building codes requires that they be ventilated out of the room through the attic and out through the roof. Cut the hole with the jigsaw. In the attic use the plumb bob to mark the center of the hole to be cut for the roof. Storage tank propane water heaters vent through the roof using galvanized steel b vents because they work through natural draft allowing the hot exhaust air to rise up and out of the facility.

Running a vent pipe out of the roof takes some careful preparation. 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. Use a plumb bob to be sure the center of the tube at the. One on the ceiling above the water heater and one that is the distance from the attic floor to the roof.

Mark the ceiling above the water heater to receive the pipe. The heater itself encompasses a sealed cover and does not use any air from the area wherever it is installed. If the vent pipe isn t installed properly the roof may leak through or around the pipe penetration leading to costly repairs. Vent pipes provide this air by running outside the structure of the house.

By contrast tankless water heaters vents can terminate on a side wall because their combustion fan blows exhaust from the units horizontally. In order to do this two critical measurements must be taken.