High Efficiency Gas Furnace Venting

Like a conventional furnace it takes in cold air from the house and runs it through an air filter.

High efficiency gas furnace venting.

It moves the air with a circulating fan. Venting for high efficiency gas furnaces assembly here are some good venting practices. While the condensing furnace is different in its design and repair needs it does have some similarities to a conventional furnace. Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys.

Also known as the type b this vent is operating on the natural air convection. This ensures the water heater can heat the vent pipe enough to get exhaust gasses to rise out of the house. A high efficiency condensing furnace can achieve efficiency ratings of 90 or above. And it has a gas burner with electronic ignition although condensing furnaces may have more electronic controls.

Higher btuh furnaces produce higher flue gas temperatures. Of the vent plus the furnace input and efficiency are factors affecting the temperature of the flue gases. 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. Two cases which can cause poor venting are the oversizing of the vent or reducing the.

It uses a venting system to extract that heat before venting. This residual liquid is highly acidic. This type of pipe is called b vent. How a high efficiency condensing furnace differs.

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. What is vented is a residual corrosive condensate of water and carbon dioxide. 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. On the other hand the higher the efficiency of a furnace the lower the flue gas temperature.

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. Example of high efficiency furnace venting on a roof 2. 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. The two systems use different venting systems.

It is classified as type bh venting. High e furnaces have separate venting.