声明，封装式屋顶单元（RTU）空调可能会在声学敏感空间产生令人不快的噪音和振动。投诉的原因包括通过屋顶的直接噪声传播、结构振动、管道风机噪声、隆隆声和管道破裂。坚持认为RTU的正确位置是避免声学问题的最具成本效益的设计技术。重点介绍RTU在结构刚度和建筑空间规划方面的位置。处理设备特性和潜在的声学问题。为安静、无振动的RTU安装提供粗略的机械设计指南。考虑RTU的适用声学额定值和规范标准。关键词:设计、空调、噪音、屋顶安装、声学、振动、组合式空调机组会议:研讨会，ASHRAE交易，第97卷，Pt。1991年，纽约

States that packaged rooftop unit (RTU) air conditioners can cause objectionable noise and vibration in acoustically-sensitive spaces. Complaints are caused by direct noise transmission through the roof, structure- borne vibrations, duct-borne fan noise, rumble and duct break-out. Maintains that proper location of the RTU is the most cost-effective design technique for avoiding acoustical problems. Focuses on RTU location with respect to structural stiffness and architectural space planning. Deals with equipment characteristics and potential acoustical problems. Gives cursory mechanical design guidelines for quiet, vibration-free RTU installations. Considers applicable acoustical rating and specification standards for RTUs.KEYWORDS: Designing, air conditioning, noise, roof mounted, acoustics, vibration, packaged air conditioning units