通风管道风管体系则是以空气为输送牟介,其元理与大型全空气air空调体系的元理基础一样。它使用主机集合型成的冷热量,将从室内的回风（或者回风与新风的合）集合施行空气安排,如冷去、加温、加湿、去湿、过滤等,再送入房内。依据房内机组和室外机组的整理,家廷用空调的风管体系可分成两类：分字体风管体系的全体式体系。
The ventilation duct system, on the other hand, is based on air as the medium of transportation, and its principles are the same as those of large-scale all air air air conditioning systems. It uses the cold and heat generated by the host assembly to arrange air from the indoor return air (or the combination of return air and fresh air), such as cooling, heating, humidification, dehumidification, filtration, etc., and then sends it into the room. According to the organization of indoor and outdoor units, the air duct system of household air conditioning can be divided into two categories: the overall air duct system with different fonts.
通风管道
Ventilation ducts
（1）分字体风管体系
(1) Split font air duct system
此体系同样称风冷通道型空调机,其空调容积大概为12~80KW,使用三相电源。它是由室外机、房内机构成,装置时2者由制冷剂铜管联接,隶属直接辉发式体系。还有一种暗装吊顶方式的分字体风管体系,其空调容积领域更小些（3~12KW）,电源有单相及三相,更适用在非常小辐面的居室。机组具备热泵效能并配有帮助电加温,用风管送风,亦可引进新风,具备空调的效能。
This system is also known as an air-cooled channel type air conditioner, with an air conditioning capacity of approximately 12-80KW and using a three-phase power supply. It is composed of outdoor units and indoor units, which are connected by refrigerant copper pipes during installation and belong to the direct glow system. There is also a concealed ceiling style split font air duct system, which has a smaller air conditioning volume (3-12KW), and the power supply is available in single-phase and three-phase, making it more suitable for living rooms with very small radiation surfaces. The unit has heat pump efficiency and is equipped with electric heating assistance, using air ducts for air supply, and can also introduce fresh air, which has the efficiency of air conditioning.
（2）全体式风管体系
(2) Full air duct system
其室外机包含缩小机、凝结器、辉发器、离心风机、轴流风机、热力膨化阀、换向阀、除霜掌控器等。房内机唯有风管微风口,房内周围的环境无机器噪音。装置时只需将室外机的岀风口和回风口同房内风管联接就可。这一类机组非常多装置在屋子顶,称作屋子顶式空调机
The outdoor unit includes a compressor, condenser, glow generator, centrifugal fan, axial flow fan, thermal expansion valve, directional valve, defrosting controller, etc. There are only air ducts and micro air vents in the room, and there is no machine noise in the surrounding environment. When installing, simply connect the outdoor unit's air outlet and return air outlet to the indoor air duct. There are many units of this type installed on the roof of the house, called rooftop air conditioning units