I am early in the use cycle so YMMV. It was crucial that an elbow was supplied with this item as my (and I suspect others) central vac is plumbed with schedule 30 thin walled pvc (not a readily obtainable item) and this allowed immediate use. It appears to reduce dust (my central vac was installed and vented previously directly into my garage), but as noted, I do not appreciate any sound reduction (and I suspect that this is due to most of the noise being the motor and not exhausted air) therefore the name ?muffler? in description is a misnomer. (and as I type this, I may consider some type of coating on the inside of the motor enclosure in attempt to reduce sound...)
Great product. 15 years ago my new system was just vented into the garage so every time you used it the garage was full of smell and dust. This filer works like a charm and now the oders are gone! However, I do note that like a lot of the other reviewers, the filter didn't really have much effect on the units noise level.
The product cut out the terrible high pitched whistle and cut down on the dust exiting the canister. The Aerus vacuum is still dreadfully noisy. I wouldn?t recommend Aerus to anyone.
My wonderful built in vac was driving my nice neighbor nuts when we cleaned the house. So this unit has been great. I rerouted the exhaust from the outside to directly under the house . The filter keeps it clean down there, and it reduces the noises by about half at the outlet.. but now, since it is under the house it?s really quieter outside. Happy Neighbors.
Reduces the noise somewhat; not as much as I'd hoped. But I am glad not to have the exhaust flowing into my basement laundry room.
seems to work good but didnt seem to reduce the noise level very much