Venting A Bathroom Fan Through A Soffit

And the closer the termination is to the soffit vents that supply ventilation air to the attic the more likely that moisture from the bathroom will be drawn into the attic.

Venting a bathroom fan through a soffit. So we have seen a step by step guide on how to easily install a soffit cover inside a bathroom for ventilation purposes. If you are looking for a diy install roof ventilation is a risky job. Even for the second story bathroom you can access the attic to vent the moisture outside. This is because soffits are used for air intake into your attic and out a ridge or gable vent.

Longer runs require more power. A down through soffit exhaust vent design by leaving warm air in the exhaust duct when the fan is off creates a heat trap that reduces heat loss out of the bathroom through the exhaust fan duct when the fan is off in comparison with up routed vents or even horizontal vents through a gable end wall. That s why wall terminations are preferable to soffit terminations. If you vent too close to the soffit the warm moist air that you re trying to get out of your home will get sucked back up the soffit and into the attic where it will cool and condense on the underside of your roof.

A soffit is the underside area of the eave or roof overhang. Again that s a point in favor of wall terminations they are a bit farther away from the soffit vent intake holes. Now connect the vent cover on the soffit using a drill if the hole is not already there. If there are holes made already tighten the screws using a screwdriver.

And as someone else pointed out make sure the fan is powerful enough to do the job. I would love to see a copy of the building code that suggests venting a bathroom fan through the soffit is recommended. Yes you can vent the bathroom fan through soffit. The alternative to a roof exhaust if you re concerned about not being able to seal the hole in the roof is to exhaust through a gable end.

If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting. This eliminates the need for you to make a hole in the roof or your walls. In cold weather it forms icicles. Just make sure that there is a slight slope to the outside so and condensation in the duct will end up outside.

A bathroom fan is usually vented to the roof or the sidewall but in many cases venting it to the soffit is more suitable. A vent at the soffit can be done but so could venting directly into the attic and both are poor choices. That is because it is not always a good idea to put a hole in the roof or the sidewall. It is feasible to vent your bathroom through the soffit rather with the help of.