Per EXT:
I still find central vacs
better when they are exhausted outside of the house.

You have me thinking. I dislike the noise of most vacuum cleaners.

But I'm guessing that retrofit of a central vac is a major undertaking -
probably not worth it.

Is there any middle ground? Maybe something where a central vac outlet
could be installed, say, in the soil stack area and then an extended
hose?
--
Pete Cresswell