Very true Mel! I believe it takes a full 64 feet of free air to actuate a full 16Hz wave, which few of us have a living room of that size! It is said that the sound can be felt (heard) with a half, or even a quarter of a wave, which would be 16', but I doubt you would have as much of an impact (oops, pun!) and probably not as easy and natural.
Yes, I can be wrong!!! I'm sure someone will disagree. I just feel that forcing a quarter wave with tons of watts doesn't compare with the easy rumble of a full wave when you have the room.
This is why I seldom bother with 32' stops at home. the effect just isn't pleasing here. Too many things in the house rattle, 'She-who-must-be-obeyed' complains, and it just doesn't sound good to me. Sometimes I use a 16' pedal coupler so that there is no bottom octave.
Of course we MUST remember that when we speak of 16Hz, we are only speaking of a single note! ALL the rest are higher than that one. Just something to think about!
I guess whatever makes you happy!
~S