High Efficiency Furnace Venting Freezing At Roof Vent

This high efficiency venting system must be installed when you install the new furnace.

High efficiency furnace venting freezing at roof vent. This vent pipe is connected to the shared vent stack with the furnace. These pvc pipes are connected to the furnace and expelled outside. To avoid this problem high efficiency furnace venting requires the use of pvc pipes instead of metal pipes to remove the acidic condensate from your home. Abs acrylonitrile butadiene styrene if you must know is the cheapest solution but it is often too flexible and susceptible to joint leaks and even cracks due to expansion contraction softening of the material with temperature difference.

Once a high efficiency condensing furnace removes this excess heat that conventional furnaces vent to the outside of a home the leftover mixture is acidic water. The gas vent pipe from the water heater tank is improperly sloped. If your furnace has an afue rating of 90 percent or above it will have a flue pipe that goes out of the side of your house. There is a disconnection at the elbow.

These types of furnaces have a dedicated pipeline that runs directly from an outside vent into a sealed combustion chamber of the furnace and a sealed vent to the outside of the home for venting the toxic fumes from the combustion process. That depends on whether you have a standard efficiency or a high efficiency furnace. That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.

Many municipalities do not allow metal foil tape either. There exist many but mainly three types of plastic are commonly used for high efficiency appliance venting. Cloth duct tape is not permitted to be installed on fuel burning appliance vent pipes. Insulating pipe is important to avoid condensate icing.