空气净化是指一定空间范围内，将空气中的微粒子、有害空气、细菌等污染物排除，并将室内温度、洁净度、压力、气流速度与气流分布、噪音振动及照明、静电控制在某一需求范围内的工程。
Air purification refers to a certain space, the air particles, harmful air, bacteria and other pollutants are removed, and the indoor temperature, cleanliness, pressure, air velocity and air distribution, noise and vibration and lighting, static electricity control in a certain demand range of engineering.
净化工程本身是属于行业的，它本身又分为市政基础设施建设及工厂装修建设以及医院环境卫生建设。属于空气方面的环境工程。我公司司的净化工程一般是建设洁净室的工程。噪声、有害气体、粉尘、污水的综合处理工程。从装饰的角度来看，净化工程也属于装饰工程，装饰工程主要分为门窗工程；吊顶工程；隔墙工程；抹灰工程；饰面板（砖）工程；楼地面工程；涂料工程；刷浆工程；裱糊工程。
Purification project itself belongs to the environmental protection industry, which is divided into municipal infrastructure construction, factory decoration construction and hospital environmental sanitation construction. It belongs to the environmental engineering of air. Our company's purification project is generally the construction of clean room project. Comprehensive treatment project of noise, harmful gas, dust and sewage. From the perspective of decoration, purification engineering also belongs to decoration engineering, which is mainly divided into door and window engineering; Ceiling works; Partition wall works; Plastering works; Decoration panel (brick) engineering; Floor engineering; Coating engineering; Brushing engineering; Paperwork.
工程是将自然科学原理应用到工农业生产部门中去而形成各学科的总称。
Engineering is the application of natural science principles to industrial and agricultural production departments to form the general name of various disciplines.
工程是科学和数学的某种应用，通过这一应用，使自然界的物质和能源的特性能够通过各种结构、机器、产品、系统和过程，是以短时间和精而少的人力做出迅速、可靠且对人类有用的东西。于是工程的概念就产生了，并且它逐渐发展为一门独立的学科和技艺。
Engineering is a kind of application of science and mathematics. Through this application, the characteristics of material and energy in nature can be made through various structures, machines, products, systems and processes. It is a rapid, reliable and useful thing for human beings with short time and less manpower. So the concept of Engineering came into being, and it gradually developed into an independent discipline and technology.
