Wood structure series are specially designed to accommodate the use in various venues, such as theater, concert hall, auditorium, convention center, house of worship, and school hall etc. For such public space long years use and easy maintenance during daily operation, from architecture design & building point of view, special attention shall be made when doing the seating design and material selection to satisfy the hall fire prevention requirements, reverberation requirements, and try as much to reduce air blow-in noise etc. YH-7738 is a recommended classic style for art center use. With varied seating width available (550mm/580mm), the same specification can be selected for standard chair, VIP chair. The chair leg uses 蠁160 bearing cylinder for air supplying from the bottom, with fractional hole area 42%, hole diameter蠁8mm, and hole distance 11mm. Similar design with different leg option please refer to YH-7736 and YH-7737. Inside the cylinder, a tapered diffuser can be installed to make sure uniform air distribution, and in the meantime, reduce air speed, noise, and balance different outlets pressure. Under the cylinder, air regulating valve can be installed to adjust air flow. As checked, with single cylinder air flow < 140m3/h, air speed at 20cm from central axis ISO9001:2015 Quality Management System; 鈥?/span> ISO14001:2015 Environmental Management System; 鈥?/span> ISO45001:2018 Occupational Health and Safety Management System Standard Upholstery & Timber Veneer Single/mixed color, custom material & color also available Measurement: 鈥?Center distance: 550mm/580mm Back height: 1000mm 鈥?Seat height: 430mm Armrest height: 645mmChina Auditorium Seating website:http://www.dfstage.com/auditorium-seating/