Robert
I agree with you about always using a 4 ply or HEPA Cloth bag in a Aerus Electrolux vacuum, but I don't agree with you about using the blue Home Solutions bags that Aerus currently makes. I have used a few of them from different packs of bags, & ALL of them have the same problem - weak filter paper that tears & leaks dirt & dust. It also seems that on both the 4 ply & blue Home Solutions bags that the sealing strip at the back of the bag can develop tears around the edge of the bag. It all depends what kind of dirt you are picking up though.
Aerus states in their warranty on their vacuums that your warranty is valid only if the blue Home Solutions are used, but due to the quality of their bags I would GLADLY use the 4 ply or HEPA Cloth bags & take my chances if the vacuum breaks under warranty. I think part of the reason the bag material was cheapened is to increase the need for the customer to take the vacuum in for service more often, & increased profits for their dealers as a result. If they denied a warranty claim for a customer using the 4 ply or HEPA Cloth bags, any lawyer worth their salt could win a claim against them based on the bag being inferior. Aerus really needs to get with the times & make HEPA Cloth bags standard on all their vacuums.
Andy & Adin - Part of the reason why the afterfilter was included on the vacuums was that they used cloth shakeout bags up until the Model LX was introduced. The afterfilter wasn't just capturing carbon dust, it was also capturing the considerable dust the cloth bag would be leaking. In my opinion, even the 4 ply bags leak enough microscopic dust that a afterfilter should be used. American collectors might be interested to know that here in Canada, our Aerus Electrolux vacuums have ALWAYS had a afterfilter, right from the very first models offered here in the early 1930's, & I have to wonder why Electrolux would have thought American consumers wouldn't care about such a feature being on a vacuum in the first place.
Rob