Whole building ventilation rate for air supply to offices

Table 3.2 Whole building ventilation rate for air supply to offices Air supply rate Total outdoor air supply rate for offices (no smoking and no significant pollutant sources): 10 l/s per person Room Extract rate Rooms containing printers and photocopiers in substantial use (greater than 30 minutes per hour): Air extract of 20 l/s per machine during use. Note that, if the operators are in the room continuously, use the greater of the extract and whole building ventilation rates Office sanitary accommodation and washrooms: Intermittent air extract rate of – 15 l/s per shower/bath, 6 l/s per WC/urinal Food preparation areas (not for commercial kitchens): Intermittent air extract rate of – 15 l/s with microwave, 30 l/s adjacent to the hob with cooker(s), 60 l/s elsewhere with cooker(s). All to operate while food preparation is in progress Specialist buildings/spaces (e.g. commercial kitchens, sports centres): See paragraph 3.30 to 3.58 Note: Adjacent to a hob means either – (a) incorporated within a cooker hood located over the hob; or (b) located near the ceiling within 300 mm of the centre line of the space for the hob.