Gas Water Heater Venting Code

On standard gas water heaters the fumes are commonly exhausted through a back draft insert and flue.

Gas water heater venting code.

The first permit is for the water heater itself. A few advantages here are that you can vent either vertically or horizontally and you can install the. These appliances are generally intended to be hardwired to a switch location but installers often buy a generic cord and plug assembly and plug. Refer to the locating the new water heater section of this manual and also the current edition of the national fuel gas code ansi z223 1 also referred to as nfpa 54 for specifics provided concerning air required.

Most items in this list apply to conventional gas water heaters but electric water heaters are also common. The flue is the venting that the fumes travel through to be safely exhausted outside of the home. In other locations such as a concrete slab basement the heater may sit right on the slab. It sits on 3 4 short legs sometimes secured to the water heater.

Assuming that you don t know anything about water heater vent pipe subject this is how the natural draft gas water heater venting should be installed. This is as easy as heading down to the local planning or building department to ask for one. Refer to the latest edition of the national fuel gas code ansi z223 1 latest edition or in canada the natural gas and propane installation code b149 1 00 latest edition for the correct sizing of venting systems and common venting with another gas appliance. The hazards of gas venting and combustion air are eliminated with electric appliances but there is still one common violation to be found.

What you need to know about venting a gas water heater. Water heater vent pipe draft hood. If the heater is located in a garage most codes want it elevated 18 above the level of the garage floor. There s no single right answer to gas water heater height requirements.

Category iv direct venting intake and exhaust pipes pvc allowed 140 f limit furnace water heater boiler manual size of pipe and allowable lengths support terminations through wall or through roof 12 above grade or anticipated snow level in same pressure location concentric venting kit 25. The main problem with atmospheric vent systems is that they are susceptible to back drafts more on that later. On top of natural draft gas water heater in its center section right above the water heater vent you should have a draft hood installed. How much does a water heater permit cost.

Atmospheric is the most common gas water heater venting option. A water heater. Discover the differences between single wall vents. The back draft insert prevents air from entering the top of the water heater and improves heat distribution in the tank.