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Range Hood Venting

We live in a new modular home in Maine. The kitchen range hood vent runs horizontally in the attic following the pitch of the roof and then vents vertically through the roof. The pipe is uninsulated and not sealed. In the winter, moist air from the kitchen condenses staining the roof sheathing and leaking through the joints and drips down onto the knee wall framing and wall of attic. Our plan is to rerun the pipe at a right angle for 22 feet and exit through the gable end, insulating the pipe and providing a slight downward pitch for the condensation to run towards the gable end. Is this a good plan? Any suggestions? How would we seal off the existing opening in the roof.

Re: Range Hood Venting

Your existing venting system can be fine, if it were finished.

It's made of components, connectors and long sheet metal pipes. All connections must be sealed with aluminum tape (which replaced the cloth duct tape), from where the hood opening goes into the pipe to where it exits the roof. On the roof, the opening must be capped. Done correctly, you won't have any problems.

Re: Range Hood Venting

hmm it is ..But for systems without external/outside venting, fumes and odors are drawn over an activated-charcoal filter and re-circulates the air, back into the room!

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