30 01276 408404 | www.greenwood.co.uk 01276 408404 | www.greenwood.co.uk 31 Commercial Ventilation Pub, club, restaurant – these fans will create a fresh environment throughout the day and night. Loads of control options from air quality to temperature sensors, make this range common sense for all commercial environments. COMMERCIAL VENTILATION COMMERCIAL VENTILATION Complying with Building Regulations and performance requirements The Building Regulations require ventilation in all new-build or refurbishment commercial premises, where planning permission is required. They work by identifying the technical requirements for:  Rapid ventilation, such as opening windows.  Background ventilation using window ventilators, airbricks, etc.   Mechanical Extract Ventilation by extractors operated mechanically and automatically. Complying with Building Regulations For maximum efficiency, careful planning for the installation, size and number of fans is required. This can be calculated by the following advice: Performance requirements:  Calculate the volume of room (length x width x height) in cubic metres.   Identify the room usage in the list below for the recommended number of air changes per hour.   Multiple the room volume by the number of air changes to obtain the required air extract rate (m3/h).   Select the fan model that has a performance at least equal to this extract rate from the Commercial range.   If no single fan meets the required extract rate, divide the rate by the performance of selected fans to establish the quantity of fans required. Ventilation of other buildings and spaces is detailed in Table 6.3 of ADF 2010, where reference is made to additional Regulations and guidance notes, e.g. CIBSE Guide B: 2005 Offices: Table 6.1a ADF 2010 extract ventilation rates Room Extract rate Rooms containing printers and photocopiers in substantial use (greater than 30 minutes per hour) Air extract rate of 20 l/s per machine during use. Note that if the operators are continuously in the room, 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 and beverage preparation areas Intermittent air extract rate of:  15 l/s with microwave and beverages only  30 l/s adjacent to the hob with cooker(s)  60 l/s elsewhere with cooker(s)  All to operate while food and beverages preparation is in progress Specialist buildings and spaces (e.g. commercial kitchens, fitness rooms) See Table 6.3 of ADF 2010 Offices: Table 6.1b ADF 2010 whole building ventilation rate for air supply to offices Supply rate Extract rate Total outdoor air supply rate for offices (no-smoking and no significant pollutant sources) 10 l/s per person 30 01276 408404 | www.greenwood.co.uk Commercial Fan Pricing per Fan (Pages 32-37) Product code Price ex. VAT (£) CD6 Commercial 6” fan £350.62 CD9 Commercial 9” fan £382.53 CD12 Commercial 12” fan £414.95