When Donnie and I bought our house this past August, I insisted we install a Central Vacuum. Not just 'any' central vacuum, but a Commerical Vacuflo. It was designed so three people could be vacuuming at once. I didn't really need all the suction and airflow it has, but I still wanted it 'just because' I can't have a Spencer.
My good friend, Evan Rogers, owner of the Vac Shack in Festus, Missouri installed it for me. Because it has two motors and is vented outside, it sounded like the tornado sirens were going off outside the house by the exhaust vent. A "cherry bomb" car exhaust muffler quieted it down to where it sounds no louder than a dryer venting outside.
I not only had three electra-valves installed so I could use my 35 foot Riccar hose and premium power nozzle - I also got a Vroom, a VacPan, two Wally Flex units and the brand new design Hide A Hose. The new design has a 60 foot hose and makes cleaning outstandingly simple and easy.
Donnie's favorite part is the Wally Flex in the laundry room. He liked it so much, he had Evan install one over the workbench in the garage as well. The Vac Pan is nice, but I rarely use it. We also had a Vroom installed under the kitchen sink, which we use all the time.
Tacony is making a power nozzle (cordless) that is similar in thought to the Air-Way power nozzle of 1970. It's a fan first cordless Ultra Light upright vacuum made without a bag provision, but instead has an extension wand to hook to the hide-a-hose. When in use, the motor is driving both the suction fan as well as the brush roller. Turning any central vacuum into a Tandem-Air machine.
As a vacuum collector, it will be AWESOME to have for my vintage tank and canister cleaners. Imagine a model XXX Electrolux with a power nozzle, or a model B Rexair with a power nozzle. So exciting.