Can Ajax work in a large multi-story home?

Yes. Ajax can support a large multi-story home when the hub, devices, communication paths, and zones are selected and tested for the actual layout. Floors, masonry, metal, distance, and device placement can affect performance, so published range figures are not enough. ASPEX Secure can test intended locations and determine whether the design needs revised hub placement, a compatible Ajax range extender, or a different wired or hybrid system architecture.