Jim wrote:

At Beaumont (Jefferson County) airport Beaumont approach and departure
are in the tower but not in the Cab (the glass enclosure for the
airport controller) The approach and departure controller sit in a
windowless room on the second floor of the tower.

At Dulles, the radar room for Dulles Approach was one floor down from
the cab (the strips just fall a short distance). At DCA, the new tower
had the radar room in the basement. The tube for the strips actually
fell 12 stories or whatever. Periodically you call the elevator and
find a bucket of strip holders in it that are being returned to the cab.

Now both approach controls along with the ones for BWI, ADW, and RIC
(none of which I've been in) are out at the fringe of the class B
at Vint Hill (Potomac Approach). I asked one of the controllers
how hard you have to throw the strips to jump the intervening 20
miles.

The new Dulles tower does have central VAC.