ActiVac III Exhaust HEPA Muffler Filter

Product Details

Eliminate Central Vacuum Odors!
  • Purifies Exhaust Air
  • Muffles Vacuum Noise
  • Traps Unhealthy Particles
Homes with the ActiVac III Exhaust HEPA Filter are most clean and healthy, especially for asthma/allergy sufferers. ActiVac installs in seconds on all central vacuums and provides incredible results.

Made from the Finest Materials
HEPA Cartridge Filter, Charcoal Membrane, Metal Reinforced, Fully Sealed. Dimensions: ActiVac sticks out 6 inches from the vacuum unit and is 18 inches tall with the elbow attached to it. Vacuums that have a dusty exhaust may have to change ActiVac yearly.

Fits All Central Vacuum Systems*


INSTALLATION: ActiVac III attaches to the exhaust port using NO GLUE. The included connector fits on TWO INCH OUTER DIAMETER plastic or metal ports. Position filter up or down.

*Activac FITS ALL BRANDS AND MODELS such as Beam, Nutone, Vacuflo, Vacumaid, SilentMaster, AirVac, etc. ActiVac DOES NOT FIT "MD" with louvers around the front and back base, MD Model J requires a spigot sweep 90, Models SV and Flo-Master M92 have two exhausts requiring a spigot and regular sweep 90 and possibly other fits to allow the filters to sit upright. ActiVac does not fit AirVac all plastic models. Large homes with 30 amp units and two exhaust ports (such as SilentMaster Model S5) require two ActiVacs and more adapters. ActiVac will not work with units exhausted outdoors.
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Part #260AV3K
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Latest Top Reviews

4 Stars
Oct 1 2021 7:24AM
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...)

4 Stars

Sep 29 2021 6:41AM
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.

5 Stars

Aug 31 2021 4:31PM
The Hepa filter is working very well. Customer service was phenominal! They explained everything quite well and told me how to install it over the phone. Especially during COVID when every other company is giving such poor service these days. I will buy everything that I need for my central vacuum from MD. In addition, I will contact MD whenever I need help with my vacuum.

4 Stars
Dec 3 2020 10:17AM
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.

5 Stars

Nov 26 2019 9:13AM
Received replacement filter, for one damaged in shipment. Arrived the next day, incredible response time.

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