The physical and performance indicators of doors and windows are: wind pressure resistance, air tightness, water tightness, heat preservation, heat insulation, sound insulation and pressure resistance. The effect of hardware accessories on the first performance of wind and pressure resistance of doors and windows determines the success or failure of doors and windows. Similarly, air tightness, water tightness, heat preservation, heat insulation and sound insulation are all related to the door and window seals involved in hardware accessories. Doors and windows are lightweight components, and their energy consumption accounts for more than half of the building energy consumption. It is the top priority of building energy conservation. The energy-saving problems of doors and windows, that is, heat preservation and heat insulation, should be fully considered in the design. If there is no multi-point lock door and window fittings, the doors and windows do a good job, and its insulation and heat insulation can be imagined. The durability of the physical properties of doors and windows is directly related to the structure and performance of the door and window hardware. After opening the rotating window into the door and window industry of China, due to its good physical and performance properties, this window type has gradually been accepted by the people. The test results prove that the airtightness and watertightness of the building doors and windows of the opening mode can reach the national standard level. At present, the structure of such hardware and profile systems used in China's door and window industry is mostly the same as the current system in Europe. The feature is that in addition to the four sides of the sash can be locked at the same time, the hardware system can realize the three-dimensional adjustment of the sash relative to the window frame, and the performance of the door and window is optimally ensured to the utmost. Door and window accessories purchase need to pay attention to the following points: 1. Look at whether the brand is well-known. The hardware used in the large-scale Guangzhou kitchen cabinet wardrobe hardware is almost always stamped and formed by cold-rolled steel. It has a thick hand, a smooth surface, strong bearing capacity, and the wardrobe door stretches freely. The door generally does not appear. In the case of slipping out of the road, the Guangzhou kitchen cabinet wardrobe hardware even achieved a silent effect. Inferior hardware is usually made of cheap metal such as thin iron, and the door is stretched and even raspy. 2, the weight of the product, the same specifications of the product, if the quality is relatively heavy, indicating that the product density is high, the material selected by the producer is relatively hard, the quality is relatively guaranteed. 3, look at the details, pay attention to the details of hardware products, is the use of ordinary grease or silicone oil? Is the cabinet door straight after installation? Is the metal paint film surface flat? From these details, it can be seen whether the product is excellent, thus confirming Whether the quality of household items is outstanding. Brass Bathtub Faucet,Brass Tub Faucet,Brass Roman Tub Faucet,Brass Freestanding Tub Faucet Heshan Janno Kitchen and Bath Technology Co.,Ltd , https://www.janno-ks.com