Furnace Roof Vent Freezing

This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.

Furnace roof vent freezing.

High efficiency furnaces. Having the stack vent freeze up is a common problem in northern climates in the winter time. This condensation vapor then moves upwards being lighter than air through the venting system. As it reaches the cold pipe and air at or near the roof line it then begins to reform into droplets and freeze on contact with the cold pipe.

Goose neck vent the master flow 4 in. Objects sticking out of a vent can allow snow to accumulate and ice over as snow is repeatedly thawed and frozen again. Blocking the fresh air intake in a small or restricted space containing a furnace can lead to negative pressure and can cause a back draft of toxic fumes and carbon monoxide to flow back down the flue vent. This happens when warm moist air from your toilet and sink drai.

These furnaces are also known as 90 percent furnaces because they have an afue rating of 90. When the vent is withdrawing air from the house it expels the gas outside through the vent. Also known as the type b this vent is operating on the natural air convection. As water enters into the drain system especially warm or hot water it condenses.

Observation there are 2 air registers on the exterior of the house on the wall opposite the furnace room. The master flow 4 in. It s made of zinc coated galvanized steel for durability and reliability. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.

Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. For many homes a gas furnace is the preferred heating device it has proven to be an efficient and reliable way of meeting household heating needs over the years. The combustion air opening at the exterior wall of the furnace room may cause pipe freezing problems for cold climates. Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation.