Air in the form of air curtain, there is a commonly used feed type, side feed type and bottom feed three. Sent air curtain: air curtain installed in the upper part of the doorway. Sent air curtain air curtain assembly and ease of installation, does not account for the construction area of ??the air curtain, does not affect the building aesthetics, air flow better sanitary conditions for the general public buildings. Despite the sending air curtain blocking efficiency is not as cold outdoor air curtain to send, but it is still a form of the most promising. General purpose air curtain door just stop outdoor cold (hot) air, usually only set the air outlet axial air curtain, no return air, so that the jet and the ground free diffusion into the room after contact, the door air curtain called Simple air curtain. Side curtain air delivery: air curtain in the doorway side of the installation is divided into two kinds of unilateral and bilateral. Industrial buildings, when the outer door width is less than 3M, should adopt unilateral air, when the outer door width is 3 ~ 18M, should adopt unilateral or bilateral air, or down on the air. In order not to block the air flow, equipped with side curtain air delivery doors open inward prohibited. By sending air curtain: air curtain is installed below ground. Due to lower feed air curtain jet strongest area in the lower doorway, so resist the cold winter wind from entering the lower part of the doorway when the efficiency of the best, and influence the direction of the door is not opened. The product consists of a low noise centrifugal fan, radiator shroud and other components, respectively, steam and hot water as heat medium air curtain door, closed the door device to prevent the indoor and outdoor hot and cold air convection. With a high pressure jet stability, cut off the effect is significant characteristics such as product structure discrete and horizontal. Optimum installation height from the ground to the outlet does not exceed 5 meters. Over 5 m height can custom design. Hot air curtain, air conditioning Watson (certified), provided by the Texas air curtain air-conditioning plant Watson. Texas Watson air-conditioning plant (www.wchuaxin.com) (www.wchuaxin.com) Shandong Dezhou, heat, refrigeration and air conditioning equipment leader, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Watson air conditioning in leadership with the staff warmly welcome all inquiries negotiations to create Watson conditioned a better future.