B.B.
I also have a dyson. I like it but nothing tops my central vac system I had in my previous house. Our last house was built new with the central vac. I would not tear up my house to install a central vac now. However, Dyson's instruction manual says if you have allergies (and to avoid that dust cloud when empyting the canister) you can empty it into a bag while forming a seal around the outside of the canister. This helps avoid the dust from everything you've sucked up. We have 4 kids and a shedding golden retriever.