High Efficiency Gas Furnace Venting Code Requirements

The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process.

High efficiency gas furnace venting code requirements.

With a replacement high efficiency furnace the existing vent pipe does not work for. It is classified as type bh venting. One pipe brings combustion air directly into the furnace and mixes it with fuel. Moving forward section 406 includes requirements for inspection testing and purging of piping systems.

The other pipe exhausts the combustion gases directly to the outdoors. There are several other important aspects of high efficiency furnace venting. When installed correctly this venting arrangement works with an 80 gas furnace or lower than 80 gas water heater. Higher btuh furnaces produce higher flue gas temperatures.

Venting for high efficiency gas furnaces materials. Better business robert parkhurst march 3 2017. Upgrading the heating and cooling system to higher efficiency equipment. Two cases which can cause poor venting are the oversizing of the vent or reducing the.

This high efficiency venting system must be installed when you install the new furnace. Indoor air requirements 80000 furnace and 40000 water heater 120 x 50 6000 ft3 800 ft2 7 ft ceiling 20. High efficiency furnaces come with two pipes. And venting of gas fired appliances and equipment.

On the other hand the higher the efficiency of a furnace the lower the flue gas temperature. Refer to your local building code the gas safety regulation under the. In a great majority of cases plastic piping is used to vent high efficiency equipment. Furthermore chapter 4 concludes with several other code.

Section 407 in chapter 4 of the fuel gas code lists requirements for piping support. Other aspects of high efficiency furnace venting. The photo below shows typical combined furnace water heater venting. The different types of venting.

Be dependent on the existing furnace system for venting. Venting gas appliances nfpa 54 code better buildings. 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. Both of these pipes are directed to the outdoors at about 95 of the furnaces that i inspect in minnesota.

Installation guide for existing houses. This practice is common with standard efficiency 80 furnaces. Of the vent plus the furnace input and efficiency are factors affecting the temperature of the flue gases. Section 408 and 409 deal with drips and sloped piping and shutoff valves respectively.

Due to the condensing nature of a high efficiency furnace its venting must be made of a material that is resistant to corrosion.