Can One Vaayu Handle a Large Chandigarh Villa With Multiple Disconnected Rooms?

No. Say it plainly, because every softer version of this answer ends up costing the client more later. Doors are the only real boundary and volume is the only real number. A closed door stops moving air, and scent travels on moving air - it does not seep meaningfully through a shut door into the next room, whatever the intensity setting says. So a villa where the living room, the study, the bedrooms and a separate family lounge are all closed off from each other by doors is not one volume with a large square footage. It is several separate volumes, and one machine, however good, is only ever in one of them. Do the arithmetic honestly rather than guessing. Take square footage, multiply by ceiling height in feet, divide by 35.3, and you get cubic metres. A 6,000 sq ft villa at a 10 ft ceiling is roughly 1,700m³ - and that is before any double-height space adds more on top. One SOSA Vaayu is rated to 1000m³. Even a villa with completely open-plan living cannot honestly run on one Vaayu at that size - and a villa split into disconnected rooms makes the single-machine plan even less true, because that 1,700m³ is not one connected volume to begin with; it is several smaller ones behind closed doors. The honest plan follows the doors, not the wish for one machine: work out which rooms actually share air - typically an open living-dining-kitchen run - and put the right machine on that connected volume, a Vaayu up to 1000m³ or an Angaan up to 3,000m³ if it runs on shared HVAC. Every other closed room - a study, a home theatre, a guest suite - needs its own machine if it is to be scented at all, and some rooms should simply stay clear. That is not an admission of failure. It is the accurate answer, and it is the one that actually works when the client walks through the house.