We are all keen to get back to work in the safest way possible, and there has been concerns over the safety of using air conditioning systems, when used in multi occupancy areas. BESA (Building Engineering Services Association) amongst other things is recommending that air conditioning fan coil units, including DX fan coils connected as a single split or part of a multi-split or VRF system, when serving a multiple occupancy area should be switched off if possible.