Household vacuum cleaners question?

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Have had a Kirby Heritage II since the mid 80's. Still gets a lot use with two long hair chihuahuas here.
It's a heavy machine but has held up pretty good IMO. Replaced motor brushes once. The cord also needed replacement due to the brush chewing on it.

I take a long a small 5 gallon Craftsman shop vac to fill the tow tube quickly when boating.

My Kirby does not like cat hair. 3 or 4 uses and the brush becomes a rotating roller just using up excess wattage :lol: