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(in case of 4G, a 4G gateway is needed)
Taken into account metal beams, concrete layers etc, hubs through which a gateway might not be able to cover the whole floor of your building.Make sure you . So the reach highly depends on the walls and construction, yet we can assume R=25m with approx area of 2000m.
Additionally, the Lora signal also reaches upwards and downwards.
Having 1 Lora gateway on every floor, zig zagging across the building (like image below) is the best practice for a good coverage. With this setup, a sensor is usually always picked up by at least 2 gateways to avoid any data package loss.
Please discuss possible (different) installation locations with your customer: hidden in the ceiling, in a printer/server room, in the cupboard of the receptionist, ...
