How can I tell if a vacuum has a Sealed System besides having HEPA Filtration?
Very Simply. You need to determine from your vacuum dealer whether the HEPA vacuum they are selling was designed with HEPA filtration and a Sealed System in mind, or did the company just modify its vacuum to accept a HEPA filter without sealing the vacuum first so it could jump on the allergy bandwagon. To your surprise you will find the latter to be the case.