Venting Gas Water Heater Through Wall Code

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

Venting gas water heater through wall code.

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. When the vent is withdrawing air from the house it expels the gas outside through the vent. The vent system for a gas fired water heater must be installed according to local and state codes or in the absence of local or state codes the current edition of the national fuel gas code ansi z223 1 nfpa 54 link to 2012 edition. Sidewall vent direct vent direct exhaust systems for oil or gas fired heaters.

Also known as the type b this vent is operating on the natural air convection. The direct vent water boiler is another type of water heater venting that you should know about. For safety water heaters must be vented using a listed and approved venting system that provides adequate size height and draft. The question is does it have to vent through the roof.

This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. With a direct vent system air for combustion is drawn from a vent pipe that runs through an exterior wall or the roof. These vents must be made of suitable materials and be kept clear of combustible materials. These questions answers about codes standards for venting gas fired water heaters were posted originally at gas fired water heater venting be sure to review the codes and standards given there.

This vent also allows for off gasses to be unleashed outside too. Colour illustration of direct vent sidewall terminal clearance distances adapted from american standard furnace installation instructions that in turn cites ansi z223 1 nfpa 54 national fuel gas code for us installations and cites csa b149 1 natural gas and propane installation code for canadian direct vent gas vent installations. Proper venting gas and propane heaters emit carbon monoxide which must be vented outside. 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.

The california water heater code is part of a. I recently inspected a split level home with a utility room that includes a 90 efficiency furnace and an electric water heater. 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. Electrical even gas water heaters have electrical parts and need to be hooked up to your breaker box.

Guide to choosing installing troubleshooting through wall or side wall venting exhaust devices for heating appliances like oil or gas fired boilers furnaces or water heaters photos examples of sidewall venting or direct venting installations that are improper and or. And if he vents it through a side wall what would be the considerations.