I don't know about any legal requirement but I do know a good deal of Canadian homes are at least pre-plumbed for central vacuums. On one of the retailer sites they claimed to have done thousands. I imagine it's an easier sell for the power unit and accessory kit if the plumbing is already in.
I still find it hilarious of the handful of people on this site leading the crusade against central vacuums. I just changed out the bag in mine back in May. It was packed well over 75% full and no loss of performance. That's a hell of a lot of dirt for these people claiming they don't clean well. They are more full of crap than that vacuum bag was.
I still find it hilarious of the handful of people on this site leading the crusade against central vacuums. I just changed out the bag in mine back in May. It was packed well over 75% full and no loss of performance. That's a hell of a lot of dirt for these people claiming they don't clean well. They are more full of crap than that vacuum bag was.