Outstanding video. Super helpful for removal and re-installation. The suggested repair is easy and effective at stopping the noise, but as one commenter mentioned it does risk creating air leaks when the flap-valve is closed. So I tried a different approach, which worked well in my case: I *very slightly* increased the weight of the very bottom of the flap-valve. (Explanation: The noise problem occurs when the flap-valve oscillates. That occurs when the rotational force that closes the valve, and keeps it closed, is slightly too weak. Due to the shape and orientation of the flap-valve, that rotational force can be increased by increasing its weight at the very bottom.) To do this, I attached a 0.5" x 1.5" strip of adhesive-backed green felt pad to the side of the valve that faces the fan, at the very bottom. "The side that faces the fan" because it is flat and easy to access. And "at the very bottom," because that maximizes leverage. Please note that I used a bit of adhesive-backed felt. A penny, for example, would be way, way too heavy. Four important details. (1) I cleaned the surface of the flap-valve thoroughly before attaching the felt, and afterward made sure it was stuck on there very firmly. If the felt were later to fall off and stick to the housing, it could prevent the valve from moving. (2) I made certain that the felt touched only the flap-valve, with no part touching the valve's housing. (3) After attaching the felt pad, I tested the weight by making sure that the valve still opened with the slightest, gentlest finger tap. That way, when the fan is turned on, it will open the valve just by the force of the increased air pressure. (I tested how much of a finger tap was required before doing the repair, and again after the repair. I wanted the weight increase to be slight enough that I could not really tell the difference.) And, of course, (4) I tested that the fan was working properly, with good air flow, after the repair was completed. As I said, this method worked well in my case.
Hello, Thanks for your comment. It great idea. I teied it few times but depending on how much wind speed is outside. It is hard to evaluate the weight on the flap. If its light, then flap still makes noise and If its too heavy then it makes exhaust fan job harder. But yes, this can be tried as one of the solutions. Thanks again for detailed information.
@@How2 Thanks so much for testing the method and for replying! Whether my idea would work in a given case might depend a lot on the rest of the configuration -- like how long the ductwork is, and what type of vent was installed where the duct exits the house. My situation might be very unusual, because I was getting the flap noise when there was little to no wind, and when it was windy, it would stop.
@@waltere.3156 Yes, that is true. It depends on how the situation is. With your explanation that yours was opposite, i had similar case few years back. It is due to the pressure from the house. When any door opens or closes it creates the pressure, which might be making yours makes noise. In that vase, adding weight helps. Thanks again.
Excellent video - you even put the fan back together which usually never happens in fix it videos. Would it be possible to to put the weather seal tape on the flap instead of the vent hole?
Hello, Yes, that flap is necessary as to only allow one way airflow from inside to out when Fan is running. Otherwise, Cold air will be coming in all the time. Hope this answers your question. Please let me know if you have any other question.
@@charlesrodriguez7984 Hello Charles, Its hard for rain water to get in for two reasons- 1. There is gooseneck vent. Thats the vent which turn and make like upside down J and doesn't allow water to go in 2. The vent pipe that is connected between exhaust and gooseneck vent has slight bend or some Contractor even do U dip in it, so water if any enter the vent pipe during rain OR any ice or moisture melt build up during winter, won't leak through exhaust. But you might be correct if the distance between exhaust and vent is not long OR gooseneck is not installed.
with this method of "repair" you may as well leave the flapper out. The flap in the video is hinged in the middle so it seals on both ends. The tape was crudely installed and while masking the tapping noise it will always be open on the end not taped. The end not taped will have a gap. one piece of tape 1/4" long, set in the center and positioned so that it acts as a bumper rather than a seal will quiet the noise and allow the flap to seal as the factory intended. There should be a second flap where the exhaust exits the home. It could be in an outside wall or under the eves in the soffit or on the roof. If you're not 100% sure about your abilities with heights and ladders call a professional. While someone is working on the outside please have them check the dryer vent too. Make sure it is clean and the flapper is free to open, so the cloths dry fast and closes so the bugs and cold stay out or AC stays in.
Hello, It depends how the exhaust fan is installed. You can also check Dryer vent or Kitchen vent which have flaps as well if you have flap noise concerns. Thanks
Outstanding video. Super helpful for removal and re-installation. The suggested repair is easy and effective at stopping the noise, but as one commenter mentioned it does risk creating air leaks when the flap-valve is closed. So I tried a different approach, which worked well in my case:
I *very slightly* increased the weight of the very bottom of the flap-valve. (Explanation: The noise problem occurs when the flap-valve oscillates. That occurs when the rotational force that closes the valve, and keeps it closed, is slightly too weak. Due to the shape and orientation of the flap-valve, that rotational force can be increased by increasing its weight at the very bottom.)
To do this, I attached a 0.5" x 1.5" strip of adhesive-backed green felt pad to the side of the valve that faces the fan, at the very bottom. "The side that faces the fan" because it is flat and easy to access. And "at the very bottom," because that maximizes leverage. Please note that I used a bit of adhesive-backed felt. A penny, for example, would be way, way too heavy.
Four important details. (1) I cleaned the surface of the flap-valve thoroughly before attaching the felt, and afterward made sure it was stuck on there very firmly. If the felt were later to fall off and stick to the housing, it could prevent the valve from moving. (2) I made certain that the felt touched only the flap-valve, with no part touching the valve's housing. (3) After attaching the felt pad, I tested the weight by making sure that the valve still opened with the slightest, gentlest finger tap. That way, when the fan is turned on, it will open the valve just by the force of the increased air pressure. (I tested how much of a finger tap was required before doing the repair, and again after the repair. I wanted the weight increase to be slight enough that I could not really tell the difference.) And, of course, (4) I tested that the fan was working properly, with good air flow, after the repair was completed.
As I said, this method worked well in my case.
Hello,
Thanks for your comment. It great idea.
I teied it few times but depending on how much wind speed is outside. It is hard to evaluate the weight on the flap. If its light, then flap still makes noise and If its too heavy then it makes exhaust fan job harder.
But yes, this can be tried as one of the solutions.
Thanks again for detailed information.
@@How2 Thanks so much for testing the method and for replying! Whether my idea would work in a given case might depend a lot on the rest of the configuration -- like how long the ductwork is, and what type of vent was installed where the duct exits the house. My situation might be very unusual, because I was getting the flap noise when there was little to no wind, and when it was windy, it would stop.
@@waltere.3156 Yes, that is true.
It depends on how the situation is.
With your explanation that yours was opposite, i had similar case few years back.
It is due to the pressure from the house.
When any door opens or closes it creates the pressure, which might be making yours makes noise. In that vase, adding weight helps.
Thanks again.
Excellent video - you even put the fan back together which usually never happens in fix it videos. Would it be possible to to put the weather seal tape on the flap instead of the vent hole?
Thanks for your comment.
Yes, you can put tape on Flap if its surface is smooth. Flap in my video has some ridges which makes tape to come off easily.
Hi, how to stop the noise from the range hood kitchen, he makes noise without even being turned on? What should I do next ?
I think I need to buy you a beer. Thank you for the video!
Very helpful! Thank you!
Does the flap really even need to be in there? Couldnt I just take it out and leave it out? Thank you for the video of this btw
Hello,
Yes, that flap is necessary as to only allow one way airflow from inside to out when Fan is running.
Otherwise, Cold air will be coming in all the time.
Hope this answers your question.
Please let me know if you have any other question.
@@How2 also rain will be able to flood in if its windy without a flap.
@@charlesrodriguez7984
Hello Charles,
Its hard for rain water to get in for two reasons-
1. There is gooseneck vent. Thats the vent which turn and make like upside down J and doesn't allow water to go in
2. The vent pipe that is connected between exhaust and gooseneck vent has slight bend or some Contractor even do U dip in it, so water if any enter the vent pipe during rain OR any ice or moisture melt build up during winter, won't leak through exhaust.
But you might be correct if the distance between exhaust and vent is not long OR gooseneck is not installed.
@@How2 👍
with this method of "repair" you may as well leave the flapper out. The flap in the video is hinged in the middle so it seals on both ends. The tape was crudely installed and while masking the tapping noise it will always be open on the end not taped. The end not taped will have a gap. one piece of tape 1/4" long, set in the center and positioned so that it acts as a bumper rather than a seal will quiet the noise and allow the flap to seal as the factory intended. There should be a second flap where the exhaust exits the home. It could be in an outside wall or under the eves in the soffit or on the roof. If you're not 100% sure about your abilities with heights and ladders call a professional. While someone is working on the outside please have them check the dryer vent too. Make sure it is clean and the flapper is free to open, so the cloths dry fast and closes so the bugs and cold stay out or AC stays in.
I think the flaps on the side of the house are what is making the noise
Hello,
It depends how the exhaust fan is installed.
You can also check Dryer vent or Kitchen vent which have flaps as well if you have flap noise concerns.
Thanks