High Efficiency Gas Furnace Venting

Venting for high efficiency gas furnaces materials due to the condensing nature of a high efficiency furnace its venting must be made of a material that is resistant to corrosion.

High efficiency gas furnace venting. Of the vent plus the furnace input and efficiency are factors affecting the temperature of the flue gases. On the other hand the higher the efficiency of a furnace the lower the flue gas temperature. A high efficiency condensing furnace can achieve efficiency ratings of 90 or above. High e furnaces have separate venting.

A high efficiency furnace uses a different type of venting system because it extracts the heat that remains in those combustion gases before venting the resultant mixture of water and carbon dioxide. Example of high efficiency furnace venting on a roof 2. This residual liquid is highly acidic. Venting for high efficiency gas furnaces assembly here are some good venting practices.

This type of pipe is called b vent. What is vented is a residual corrosive condensate of water and carbon dioxide. It is classified as type bh venting. When a standard efficiency furnace is replaced with a high efficiency the existing vent pipe must be replaced with the vent size the water heater requires.

This is mostly stuff i learned during a training session from ipex one of the major manufacturers of plastic piping with a little of my personal experience and tips first of all venting must be planned in order to be sized properly. It uses a venting system to extract that heat before venting. Two cases which can cause poor venting are the oversizing of the vent or reducing the. How a high efficiency condensing furnace differs.

And it has a gas burner with electronic ignition although condensing furnaces may have more electronic controls. The two systems use different venting systems. Higher btuh furnaces produce higher flue gas temperatures. Like a conventional furnace it takes in cold air from the house and runs it through an air filter.

When the vent is withdrawing air from the house it expels the gas outside through the vent. In a great majority of cases plastic piping is used to vent high efficiency equipment. While the condensing furnace is different in its design and repair needs it does have some similarities to a conventional furnace. This ensures the water heater can heat the vent pipe enough to get exhaust gasses to rise out of the house.

It moves the air with a circulating fan. Also known as the type b this vent is operating on the natural air convection.