High Efficiency Gas Furnace Venting Code Requirements

High efficiency furnaces come with two pipes.

High efficiency gas furnace venting code requirements. Of the vent plus the furnace input and efficiency are factors affecting the temperature of the flue gases. The different types of venting. The other pipe exhausts the combustion gases directly to the outdoors. Venting gas appliances nfpa 54 code better buildings.

The photo below shows typical combined furnace water heater venting. Be dependent on the existing furnace system for venting. Other aspects of high efficiency furnace venting. There are several other important aspects of high efficiency furnace venting.

Well making sure that you choose the right venting style will protect them. Due to the condensing nature of a high efficiency furnace its venting must be made of a material that is resistant to corrosion. This high efficiency venting system must be installed when you install the new furnace. The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process.

Indoor air requirements 80000 furnace and 40000 water heater 120 x 50 6000 ft3 800 ft2 7 ft ceiling 20. Better business robert parkhurst march 3 2017. Both of these pipes are directed to the outdoors at about 95 of the furnaces that i inspect in minnesota. When installed correctly this venting arrangement works with an 80 gas furnace or lower than 80 gas water heater.

Moving forward section 406 includes requirements for inspection testing and purging of piping systems. On the other hand the higher the efficiency of a furnace the lower the flue gas temperature. Section 408 and 409 deal with drips and sloped piping and shutoff valves respectively. Two cases which can cause poor venting are the oversizing of the vent or reducing the.

Section 407 in chapter 4 of the fuel gas code lists requirements for piping support. 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. For homes with gas fired warm air furnaces this could mean replacing an existing 70 to 80 annual fuel utilization efficiency afue furnace with a high efficiency furnace in the 90 to 98 afue range. Refer to your local building code the gas safety regulation under the.

Venting for high efficiency gas furnaces materials. Installation guide for existing houses. This practice is common with standard efficiency 80 furnaces. It is classified as type bh venting.

Upgrading the heating and cooling system to higher efficiency equipment. Furthermore chapter 4 concludes with several other code. And venting of gas fired appliances and equipment. In a great majority of cases plastic piping is used to vent high efficiency equipment.

These can include hot water tanks and other equipment related to the home.