Gas Water Heater Exhaust Code

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.

Gas water heater exhaust code.

The photo below shows typical combined furnace water heater venting. The different types of venting. The first permit is for the water heater itself. The difference is that a power vent water heater pulls in combustion air from the space around the appliance then uses a fan to propel the exhaust through the vent.

With a replacement high efficiency furnace the existing vent pipe does not work for water heater only because the vent is too large. Installing a tank water heater might seem easy but homeowners who refinish their basements often create a number of code violations with respect to the water heater. How much does a water heater permit cost. The insertion of another liner or vent within the chimney as provided in this code and the liner or vent manufacturer s instructions.

The natural gas fueled water heater shown at page top is improperly vented lacking the recommended minimum 12 of vertical rise before the elbow and vented directly into a large masonry flue. This article series describes proper ventilation details for handling the exhaust from gas fueled water heaters both lpg or propane and natural gas. When we are talking about gas furnace vent pipe code we need to talk about the different types of the vents first after all you want to keep your family safe from harm. Well making sure that you choose the right venting style will protect them.

All water heaters that burn natural gas or liquid propane lp gas require a venting system. For sizing a gas vent connected to two appliances with draft hoods the effective area of the vent shall. Gas appliance direct vent clearances distances from direct gas vent to building features sidewall vent direct vent direct exhaust systems for gas fired heaters water heaters other appliances. When installed correctly this venting arrangement works with an 80 gas furnace or lower than 80 gas water heater.

Table illustrations of the required space between a direct or side wall vent for a gas fired heating appliance and building windows doors corners gas meter air intakes sidewalks balconies. Water heater shall be of the direct vent type. Code expert glenn mathewson describes 10 common water heater code issues including confusion about drip pans and drains unsupported expansion tanks and plastic vents lack of combustion air and more.