High Efficiency Gas Furnace Venting

It is classified as type bh venting.

High efficiency gas furnace venting.

How a high efficiency condensing furnace differs. 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. This type of pipe is called b vent. 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.

Higher btuh furnaces produce higher flue gas temperatures. In a great majority of cases plastic piping is used to vent high efficiency equipment. It uses a venting system to extract that heat before venting. When the vent is withdrawing air from the house it expels the gas outside through the vent.

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. While the condensing furnace is different in its design and repair needs it does have some similarities to a conventional furnace. 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.

Of the vent plus the furnace input and efficiency are factors affecting the temperature of the flue gases. This residual liquid is highly acidic. Like a conventional furnace it takes in cold air from the house and runs it through an air filter. Venting for high efficiency gas furnaces assembly here are some good venting practices.

It moves the air with a circulating fan. This ensures the water heater can heat the vent pipe enough to get exhaust gasses to rise out of the house. In contrast modern high efficiency condensing furnaces exhaust much cooler gasses and need only plastic pipe materials such as pvc cpvc or abs for their exhaust vents. Also known as the type b this vent is operating on the natural air convection.

Example of high efficiency furnace venting on a roof 2. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys. And it has a gas burner with electronic ignition although condensing furnaces may have more electronic controls.

High e furnaces have separate venting. Two cases which can cause poor venting are the oversizing of the vent or reducing the.