We recommend that you vent your central vacuum outdoors. To do so, run pvc pipe from the vacuum exhaust to the exterior of the house, and add a exhaust vent to the outside of the house. Venting to the outside is more effective than having a HEPA filter on your vacuum. A HEPA filter is 99.97% efective, where a central vacuum vented outside is 100% efective, all the particles that come throught the exhaust go directly outdoors rather than indoors.
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