Thread Number: 39626  /  Tag: Recent Vacuum Cleaners from past 20 years
Central Vacuum Mufflers 		[Down to Last]

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Post# 420393   2/22/2020 at 10:21 (1,515 days old) by mmcphee (Lisbon Falls, Maine)        

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I am wondering what everyone uses for a muffler on their central vacuum system and if anyone has a cherry bomb or glass pack muffler on their central vacuum system. If you could post pictures, that would be fantastic.

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Post# 420394 , Reply# 1   2/22/2020 at 10:59 (1,515 days old) by vacuumdevil (Vacuum Hell )        

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@mmcphee my central vac was quite enough I was just able to vent it outside without a muffler. I've never heard of anybody putting a cherry bomb glasspack on a central vacuum I would assume that would make it louder like it does on a car.

Here's a video of an MD central vacuum with a muffler.





Here is the full video on my system that's personally installed in my house.





Hope that's of use.

Post# 420400 , Reply# 2   2/22/2020 at 11:33 (1,515 days old) by crazykirbydude (Lexington, KY)        

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The one that my local Aerus dealer uses in central vac installations uses a series of baffles to reduce the sound. It actually makes quite a difference.

Post# 420419 , Reply# 3   2/22/2020 at 18:12 (1,514 days old) by Lesinutah (Utah)        
Hmm

 lesinutah's profile picture
You could use double layer soundboard with second layer on floating channels. You would not here a thing.
You could put a spoiler or a Type R logo. I hear they increase horsepower.
If it has an exhaust I wonder if central vacs have blower ports.
I get the gist of central vacs. You put in HVAC ducts. It has to be ran off it's own ducts. Does it run on 110 line either 20 or 30 amp or is it a 220 line.
Thanks
Les

Post# 420429 , Reply# 4   2/22/2020 at 20:06 (1,514 days old) by huskyvacs (Gnaw Bone, Indiana)        

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Les, central vacs use PVC pipe for ducting.

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Post# 420431 , Reply# 5   2/22/2020 at 20:10 (1,514 days old) by huskyvacs (Gnaw Bone, Indiana)        

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Actual central vac mufflers look like this

evacuumstore.com/p-12368-sound-o...

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Post# 420433 , Reply# 6   2/22/2020 at 20:44 (1,514 days old) by Lesinutah (Utah)        
I see

 lesinutah's profile picture
That's why central vacs on classifieds site has PVC fittings on every one.
Les


Post# 420435 , Reply# 7   2/22/2020 at 20:52 (1,514 days old) by crazykirbydude (Lexington, KY)        

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It's actually a special type of thin walled pipe made specifically for central vac installs.

Post# 420438 , Reply# 8   2/22/2020 at 21:42 (1,514 days old) by huskyvacs (Gnaw Bone, Indiana)        

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Correct, it's still PVC pipe but it's special made for central vac use due to diameter and I guess the bends in the pipes on curved parts to allow for better airflow.

There's some FAQ's here. www.centralvacuumstores.c...

But all in all its pretty similar to running plumbing pipe. It probably would not be economical to retrotfit it into a vintage home that never had one - but a lot of new homes have them already built in from the homebuilder now.

Post# 420440 , Reply# 9   2/22/2020 at 22:44 (1,514 days old) by Lesinutah (Utah)        
Ya

 lesinutah's profile picture
I'm a couple months away from being a plumber for a year.
To have the pipe hold airflow you don't want any 90 degree bends except this has air running through it.
The PVC has to be so thick to hold pressure.
Thanks for help.
I'll look into making a mini central vac for workshop shed.
Les

Post# 420447 , Reply# 10   2/23/2020 at 04:29 (1,514 days old) by gregvacs28 (U.S.)        

Another suggestion is to apply some type of sound insulation inside the motor compartment.  Manufacturers have recently started doing this  (can you imagine it's a NEW thing?  What were they think decades ago?) 

 

What I've done is to get some thick plush carpeting and some medium guage chicken wire and basically carpet the inside of the motor compartment but wrap the carpet piece in a plastic bag.  Then to be sure the carpet stays in place, use chicken wire formed to push against the carpet and make sure it doesn't come in contact with the motor.  Make sure not to block vent holes if you have a by-pass motor.

 

What a difference in noise.  I have an Vacumaid SR38 and it's quieter than a canister vac now. 
Post# 420456 , Reply# 11   2/23/2020 at 09:29 (1,514 days old) by n0oxy (Saint Louis Missouri, United States)        
whether to use a muffler

 In many cases, the central vacuum unit is installed in the basement or garage so the sound wouldn't be an issue anyway. I use all of my central vacuum units without pipes, just connect a hose directly to them and some are definitely louder than others. In particular, the two motor units are quite loud without a muffler. On the other hand, units such as the Drainvac Viper are quiet enough, even without a muffler that you can still have a normal conversation while in the same room. I think that unit has sound blocking material in the canister which does the same thing as a muffler.
Mike

Post# 420459 , Reply# 12   2/23/2020 at 10:15 (1,514 days old) by crazykirbydude (Lexington, KY)        

crazykirbydude's profile picture
I know the Aerus Electrolux central vacs have an additional muffler that sits on top of the motor compartment. It's a plastic disc with a layer of thick foam inside.


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