I always wondered about these "Fire Plug" Airway's,,,,and assume the idea was to place the machine in the middle of the room, and the 1940's housewife would work around the room like a clock, with the hose? What if the hose wasnt long enough to reach all the areas of the room?
Being that these vacs were so heavy,,Were they intended to be left in the room permanently, like over to the side or corner somewhere, when not in use?,,or where they intended to be hauled off and stored in a closet after using?
I wonder if some woman had a problem lifting them,,,certainly if the room was large enough,,,the vac would have to be lifted and moved a little here and there to reach all areas of the room.
Yikes! I bet many a 1930s,40s houswife complained to their husband (or anyone that would listen) about how heavy that monster was!,,,and/or made THEM come and lift/shift it around the room.
I also bet vacuuming a long carpeted stair case was a nightmare with using it! I guess someone would have to hold the thing upright on a lower stair, while the user went up step by step with the hose.
I wonder how many hosewives back then got rid of the Fire Plug in post and in haste when the Kirby man came and showed her his new "Feather Weight" Kirby!! haha