The Delfin DM3EL 110V vacuum cleaner PN: 500-9359 is an Industrial strength vacuum cleaner that Summa offers in the USA market only. This is offered as an alternative to the Hercules vacuum only offered in Europe.
Attached you will find documentation of the Delfin vacuum cleaner. Additionally you can find online tutorials about filter replacement:
Filter replacement: https://www.youtube.com/watch?v=pH_BaffFTs4
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