Thanks, John. I just purchased a partially used box of Home Solutions bags and read that same information on it. I would take for granted, then, that all Home Solutions bags have the filtration you've described?
I wonder just how necessary after-filters are for a person with no dust allergies if the Home Solution bags--or especially the HEPA bags-- are so efficient at filtering the air?
Anyway, I love to have my windows open when the humidity and heat are tolerable (which has been most every day this spring and summer), and since I am proactive at keeping the dust in my house at minimum levels (e. g. replacing the furnace filter regularly, dusting, and vacuuming) it seems pointless to have a cleaner with an after-filter. My daily drivers are a Model G and a Model 1505/Silverado. I suppose a secondary filter wouldn't hurt for added motor protection and reducing odors, though.
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DT, Tom knows his Electroluxes and Aeruses, so I would agree with his assessment that your cleaner's condition is atypical of the brand. Your idea of the bag getting wet with vomit and animal excrement is plausible from the photos you've posted of it. Suffice it to say that at least one damaged bag caused your machine's inside to get coated with contaminants.