High Efficiency Furnace Venting Freezing At Roof Vent

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.

High efficiency furnace venting freezing at roof vent.

In a great majority of cases plastic piping is used to vent high efficiency equipment. Since it takes less energy to move the cooled exhaust horizontally he furnaces typically exhaust to the side of a building rather than the top. This combination of carbon dioxide and water would damage the type of vents used in conventional systems which run vertically out of a home. There is a disconnection at the elbow.

If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. This residual liquid is highly acidic. Cloth duct tape is not permitted to be installed on fuel burning appliance vent pipes. This condensing process along with the one that occurs within the high efficiency furnace itself creates moisture that can collect and freeze around and inside exhaust pipes since it can t travel far enough away from the home before condensing.

That depends on whether you have a standard efficiency or a high efficiency furnace. As the gases are cooler pvc cpvc or abs piping can be used to carry the exhaust to the outside. 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. It s a high efficiency gas furnace and that s the exhaust vent.

This vent pipe is connected to the shared vent stack with the furnace. The gas vent pipe from the water heater tank is improperly sloped. What is vented is a residual corrosive condensate of water and carbon dioxide. It uses a venting system to extract that heat before venting.

When exhaust gases discharged from a high efficiency furnace exhaust vent meets the cold air the air condenses faster than conventional furnaces because it is cooler. Many municipalities do not allow metal foil tape either.