Gas Furnace Vent Pipe Leaking Rain Water

Gas furnace leaking water from evaporator coil.

Gas furnace vent pipe leaking rain water. Why a high efficiency furnace creates condensation how in the heck does a high efficiency furnace create condensation water anyway. Dura vent makes a cap called the brider cap that works very well and is not as open as your current cap. If your furnace exhaust pipe or flue pipe is leaking it can be a sign of a much bigger problem. Poorly designed exhaust pipe.

There could be a few reasons why your furnace is leaking water but let s start with the most likely one. Why a conventional furnace leaks water. So if it is dripping water you should have a professional inspect the unit immediately. Every system will have certain wet time when the flue is cold er and will produce condensate until the flue warms up.

However if this tube becomes clogged or if the drain on your floor becomes it can cause water to backup and leak out of the furnace. No water was coming from the flashing or above the first flue seam inside the attic i e. There are two main issues that can cause your conventional furnace to drip water. Also raise and re goop the storm collar.

This is typically flown out of a pvc pipe that comes from the furnace and drains into the floor drain in your furnace room. Here s what to look for. The evaporator coil is the indoor coil for air conditioning. When your roof was installed each vent pipe received a flexible boot to seal water around the round surface of the vent pipe.

An upflow gas furnace will have the evaporator coil installed on top of it. Vent pipe leaks during heavy rain can occur if you have cracks in your vent pipe boot or flashing. Where my gas furnace flue pipe type b runs through my attic i had water dripping from the connections seams in the area where it makes a 45 degree bend water was inside the pipe from blown rain. An easy way to tell if you have a high efficiency furnace is to look at.

You ll know if you have a high efficiency furnace if. The yellow energy guide tag says your furnace s efficiency is 90 or higher afue. If water does enter the combustion air pipe there should be a tee installed at distinct locations to prevent water from entering and leaking from the furnace. Sun exposure and heat especially during the summer can cause the rubber boot to crack creating the space for water to leak in.

These boots vary in quality flexibility and longevity. I have a storm collar and a high wind storm cap. And over time many vent pipe boots get hard and brittle as. High efficiency furnaces those with an annual fuel utilization efficiency afue rating of 90 percent or higher have cool exhaust and as a result they produce condensation.

The flashing and vent pipe entry was sealed right. When the roof vent is leaking the actual cause must be identified first. B vent is a good low mass system when properly laid out and installed.