You can see your home looking its best for the holidays – cleaned from top to bottom, with sparkling holiday decorations and smiling friends and family gathered to help celebrate – but what you can’t see in your home could spoil everything.
二氧化碳（CO <子> 2 ）是人类呼吸的副产物。每个我们呼出时间，CO <子> 2 被释放到周围的大气中。 Currently, CO2 sensors can be used to automatically control ventilation systems in buildings equipped with Building Automation Systems (BAS). This is referred to as Demand Control Ventilation (DCV).
The ComfortLink™ II Thermostat from Trane is the company’s latest and most innovative offering. With its 7" interactive high-definition color touch screen, the product is the ultimate home comfort connection. Providing an intuitive user interface, the thermostat serves as an easy-to-use central planning center for the home, bringing year-round home comfort and control right to one’s fingertips. The ComfortLink II Thermostat will launch in early 2011 and, even before its official debut, has already been named a Consumer Electronics Show (CES) Best of Innovations 2011 Honoree and winner of the Popular Mechanics 2010 Breakthrough Award.
Energy recovery ventilation systems provide a controlled way of ventilating a home while minimizing energy loss. They reduce the costs of heating ventilated air in the winter by transferring heat from the warm inside air being exhausted to the fresh (but cold) supply air. In the summer, the inside air cools the warmer supply air to reduce ventilation cooling costs.
Balanced ventilation systems, if properly designed and installed, neither pressurize nor depressurize a house. Rather, they introduce and exhaust approximately equal quantities of fresh outside air and polluted inside air, respectively.
供应通风系统进行加压的建筑工作。他们使用一个风扇强制外界空气进入建筑物，而空气通过所述壳体，浴缸和范围风扇管道孔漏出建筑物的出，以及故意通风口（如果存在）。
排气通风系统通过减压建筑工作。通过降低室外的空气压力低于所述内部空气压力，它们提取的室内空气从房屋，同时通过在建筑壳泄漏，并通过有意的，被动通风孔的补充空气浸润。
The decision to use whole-house ventilation is typically motivated by concerns that natural ventilation won't provide adequate air quality, even with source control by spot ventilation.
自然通风曾经是最常见的通风让新鲜的室外空气取代室内空气在家里的方法。今天，它通常不是最佳的通气策略，尤其是对于那些正确的空气密封获得能源效率。自然通风也通常不能提供足够的水分控制。
当通过空气密封技术，它要考虑通风是非常重要的。除非适当通风，不透气家里就可以在室内空气污染物密封。通风还有助于控制水分 -another一个健康的，节能的家重要的考虑因素。
<跨度风格=“字体大小：12磅;”> <强>膨胀接头和环路 可以在其中包含与流体的任何管道系统需要温度高于正常室温升高。大多数管道中的商业系统是由金属的;公共管道材料包括铜，黑色铁，钢和不锈钢。当热量被施加到金属时，其经历的热膨胀。膨胀速率取决于金属和施加的热量。In piping, there are two directions in which thermally expansion can take place: circumferential and longitudinal. Circumferential lengthening is negligible and therefore is not a concern. But longitudinal expansion, depending on how long a pipe is run, can be several inches or more. Because piping is rigid, if the change in length is not provided for via expansion fittings or loops, the pipes can shear the connections and cause ruptures. Different metals expand at different rates, but all expand with the addition of heat. Expansion fittings and loops allow the piping to expand without failure.
有三个目的的 <强>绝缘导管 ：以延缓的热的流动，以减少的量导管传输的声音，和/或充当蒸汽屏障。以延缓的热流，管道可以在内部被隔热用管道衬垫，或与导管缠绕外部。为了减少管传导声波的量，可以使用一种产品称为声音衬垫。作为蒸汽屏障，管道通常包裹着一个可密封的蒸气等的材料箔或塑料。
本主题涵盖了与测试，调整和供暖，通风和施工过程中安装空气调节（HVAC）系统的平衡信息。测试评估HVAC设备，HVAC系统内调节套装置的操作和平衡期间，以实现高效的性能进行调节HVAC系统的空气或水的流动。