What innovations have made Vacuum Cleaners clean better and what are the best examples of these?

[vacu-finder]

Vacu-Finder--which Oreck Power nozzle for Central Vacs?

Durango159,

I'm referring to the older type P/N...They were very reliable and did a great job for the central vacs.

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You mention that the Oreck power nozzles for central vacs are great. Are you perhaps referencing the Allegro Smart power nozzle that has styling on the hood resembling a hybrid mixture of Hoover Windtunnel and Quadraflex power nozzles? See link.
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[kirbyultimateg]

In my opinion, Hoover really improved the Convertible in the 1970s when they introduced the Type A bag and the front conversion attachment set. Does anybody agree with me?