The power unit is the heart of any central vacuum, housing the motor, canister, and filtration. The Vacuum Store compares units from CanaVac, DrainVac, DuoVac, Nilfisk, and Cyclovac, so you can weigh motor output, canister capacity, and warranty coverage against your home's needs. https://www.thevacuumstore.ca/blogs/news/best-central-vacuum-systems-canada-buying-guide