In an office or commercial building the ventilation is usually centralised: one air handling unit, a network of ducts and a large number of ceiling diffusers and grilles. The air quality in every room depends on the condition of that entire network, not only on the visible grilles in the ceiling.
We work intake-first: you send a floor plan, photos of the grilles and of the technical room, and we assess the system, the accessibility and the amount of contamination. You then receive a fixed scope and a fixed price, plus a schedule that fits your business hours.
During execution we work per zone or floor, outside peak moments. Workstations are protected, corridors stay passable and the work area is tidied and cleaned afterwards.