Loud Radon Fan? How to Install a Radon Fan Noise Suppressor

[@AmericanRadonMitigation]

Short Noise Suppressor - americanradonmitigation.com/product/attic-noise-suppressor-short/ Medium Noise Suppressor - americanradonmitigation.com/product/attic-noise-suppressor-medium/ Outdoor Noise Suppressor - americanradonmitigation.com/product/outdoor-noise-suppressor/ Other things you may need: We earn a commission when you purchase using these links. 4X3 PVC Reducer Bushing - amzn.to/3Z8y7ZF 4X3 Rubber Reducing Bushing - amzn.to/45G0r8a 4X3 Rubber Coupler - amzn.to/3LegW39 Tape Measure - amzn.to/3LaLxP2 Level - amzn.to/45QXrWd Nut Driver - amzn.to/45HvyjM PVC Primer - amzn.to/3RbHA0j PVC Cement - amzn.to/3PbhhVw 3-Inch PVC Pipe - amzn.to/3r37CbD 4-Inch PVC Pipe - amzn.to/485rziD Thin Wall Pipe to Schedule 40 Pipe Adapter - amzn.to/3PtR5Hd Milwaukee Saw - amzn.to/486TD56 Other Resources: Get an estimate within an hour of the Twin Cities, MN - americanradonmitigation.com/free-estimates/ Consulting - americanradonmitigation.com/product/consulting/ Tool Kit Rental - americanradonmitigation.com/product/radon-tool-kit-rental/ EcoQube Radon Monitor - americanradonmitigation.com/product/ecoqube/ Please feel free to leave a comment for basic questions, and we'll try to answer whenever possible. Thank you so much for watching!

[@WestonMorrisdoBrasil]

I really appreciate how you clearly explain things, Alan. Thank you!

[@AmericanRadonMitigation]

Glad it was helpful!

[@nicholasflores1342]

What do you have inside your PVC ? When I looked at your pictures it looks like you added something inside the couplings of the two 4x6” pvc couplings. Is that to help reduce noise?

[@sega4481]

Do you recommend to add anything to the top of the PCV pipe on the roof to prevent rodents, leaves, weather, etc?

[@AmericanRadonMitigation]

Do you have a problem with squirrels or have trees above your radon system’s exhaust discharge?

[@sega4481]

Mostly Squirrels and mice, live in and area with alot of trees so leaves can be an issue

[@AmericanRadonMitigation]

We use these ones when there's a chance something can enter the discharge piping. amzn.to/48jcXMr We do earn a commission if you purchase using the link. Thank you for your support!

[@rich32822]

I really like this idea! We have a system in our garage and there is just a slight hum essentially throughout the house but more evident in the 2 bedrooms bordering the garage wall. Are we most likely hearing exhaust noise or would it be the actual fan/blower mounted in the rafters in the garage? Have you noticed a quieter inside after installing this suppressor?

[@AmericanRadonMitigation]

It could be the leading fan’s vibration transferring noise to your home’s framing. I would check that first. The noise suppressor will help with the exhaust noise but not a vibration-transferring noise. You could also add suction points and use a smaller quieter fan.

[@rich32822]

@@AmericanRadonMitigation Is vibration noise through the house a typical complaint? If so, do you have any videos discussing remedies?

[@lance752]

Do the noise suppressors impact performance?

[@AmericanRadonMitigation]

@@lance752 We measured this type of noise suppressor a few years ago and were surprised to find that it has a negligible impact on airflow and pressure drop.

[@Ch00chCharlie]

Married! Congratulations!

[@AmericanRadonMitigation]

Thank you, Charlie! Are you going to the symposium?

[@perlarenova682]

Can it be installed next to the roof vent? (pvc pipe)

[@AmericanRadonMitigation]

Yes, it can.

[@OoooInteresting]

How would these (Medium Suppressor, specifically) affect CFM?

[@AmericanRadonMitigation]

When we tested the noise suppressor in this video at a radon conference several years ago, its effect on CFM and pressure drop was negligible.

[@ALAl-zw8tq]

Hi , thanks for your video , I have a question , I want to evacuate my radon on the roof of the house , my pipe exhaust will be near the edge of the roof 2 feet above the roof, but I have a window on that side that is 3 feet below the exhausts pipe is this a problem ? will the radon come back down and re-enter the house ? Radon gas is heavier then the air I presume ?

[@AmericanRadonMitigation]

Check out section 6.4 of the radon mitigation standard. standards.aarst.org/SGM-SF-2023/24/index.html#zoom=z

[@petercullen746]

@AmericanRadonMitigation This noise suppressor seems to work just like a car muffler, muffling the sound exiting the pipe. My problem is that the external fan itself makes a low droning noise that is coming directly into the adjacent living room, and I also hear it in the upstairs bedroom. So it seems my solution involves encasing the fan in some sort of noise reducing box. Do you have any suggestions?

[@AmericanRadonMitigation]

It sounds like the piping above or below the fan is making direct contact with your home’s framing, allowing the vibration of the fan to transfer to the lumber, which can cause the noise you speak of. We often see this with high-suction fans and when the piping below the fan is in direct contact with the rim joist. If that's the case, you may try switching to a smaller fan or enlarging the hole through the rim joist so the piping doesn't touch it. You can fill the gap with backer rod, expanding foam, or rubber. If that's not the case, you can also try loosening the clamp directly above the fan.

[@chillydawgg4354]

What is your opinion on condensate bypassing fir outdoor systems? Can a suppressor like this be combined with a condensate bypass?

[@AmericanRadonMitigation]

We install them on most of our exterior systems. Yes, you can install a noise suppressor with a condensate bypass as well. You'd want the outdoor version. americanradonmitigation.com/product/outdoor-noise-suppressor/

[@ScottofGP]

Does it matter where I add the suppressor? I have the fan outside with the pipe going up my wall and around and above the gutter. It seems easier to install this at the fan, but will it suppress the exhaust noise if the suppressor is at the fan and there's 10 ft of pipe above that? On the other hand, I'm concerned about it being a bit top-heavy if I install it at the top.

[@AmericanRadonMitigation]

On an exterior system like yours, we install the outdoor noise suppressor directly above the radon fan. The piping would then go from the top of the noise suppressor to the wall of the house and up. You will likely have to adjust some of the piping. Here’s a link to the noise suppressor I would recommend. americanradonmitigation.com/product/outdoor-noise-suppressor/

[@scotthensler8912]

Wow! Thanks so much for your quick response. Great videos 👍

[@ALAl-zw8tq]

Hi , does it make a difference in the noise level if you connect the silencer right after the fan compare to connect it on the roof at the end of the pipe ?

[@AmericanRadonMitigation]

We always connect the noise suppressor directly above the radon fan. I'm not sure it would make a difference in noise levels if you added the noise suppressor on top like we did at the beginning of this video. However, the fiberglass insulation inside the noise suppressor will likely be more protected from the sun if it's not mounted at the top of the system.

[@ALAl-zw8tq]

thank you make sense

[@AmericanRadonMitigation]

You bet.

[@mabdman2140]

​@AmericanRadonMitigation if we are hearing the fan from a bathroom and bedroom below the attic fan, would a suppressor help? I was considering more batt insulation between the fan and ceiling. You can hear the fan from the rooms directly below?

[@AmericanRadonMitigation]

It may help some. However, it seems to help most with the exhaust noise outside the house. It sounds like your fan may be oversized, though.