why does our bathroom exhaust fan drip water?

Answer 1

Is it a roof leak? That is easy enough to rule out. It should not drip water unless it's raining.

I suspect condensation. My guess is that your device is recirculating, which is pretty much useless. To remove the humidity, it must be discharged outside of the home, through the roof or soffit. It is extremely important to remove excess humidity, as this condition will eventually give rise to fungal growth.

Some brave soul needs to investigate your existing ventilation condition (possibly an attic job) and find a way to remedy the steam room effect. Good luck!

Answer 2

Very few contractors make a practice of exhausting bathroom vents outside. Most just exhaust into the attic.
Short of a leak in the roof, I'd check the volume of air that the fan is moving. The fan may be weak, or there may not be enough fresh air entering the room for the fan to circulate adequately.

Answer 3

All of the answers are good. One thing to consider to prevent condensation is whether or not the moist air can exist before it is cooled, resulting in condensation. This is usually only a problem in cold climates, when your duct is very long, or if the ducting has an obstruction such as "S" turn. In very cold climates, this can even cause a ducty to fill with ice, which then melts and drips back through the fan.

Also, to check whether or not you have enough fresh air flowing into the room. Just leave your door cracked open an inch.

Answer 4

Vent is clogged. Drip is caused from condensation. Clear the exhaust vent from the outside to fix!

Answer 5

Perhaps it's blocked. If it's dripping to the outside I wouldn't worry too much.

Answer 6

unless you have it vented to the outside, the condensation from the steamy shower air is accumulating with nowhere to go....so it drips back down

Answer 7

Maybe condensation build-up from a humid room or the weather in general.

Answer 8

condensation after a shower?

a leak from the roof? (that's what ours is... not so good...)