The form and function of building ventilation louvers

1，Forms of external building ventilation louvers 

There are many forms of building ventilation louvers.building ventilation louvers facilities can be generally divided into two categories: permanent  and temporary. Temporary sunshade refers to cloth curtains, bamboo curtains, venetian blinds, canvas tents, etc. set up on windows. Permanent sunshade refers to the long-term use of sunshade components installed on various parts of the building envelope.

In summer, there are two ways for solar radiation to cause indoor overheating: directly entering the room through windows and heating the surface of the outer protective structure. Based on the way of shading solar radiation and heat transfer, building ventilation louvers can be divided into aluminium sun louvers window shading, aluminium shade louvers roof shading,aluminium sun louvers wall shading and entrance shading.

2. Function of of external building ventilation louvers

⑴External building ventilation louvers can effectively prevent solar radiation from entering the room, aluminium sun louvers not only improving the indoor thermal environment, but also greatly reducing the cooling load of the building's air conditioning in summer. Studies have shown that designing 1m-deep aluminium shade louvers around large-area glass curtain walls can save about 15% of air-conditioning power consumption.

⑵. External building ventilation louvers can prevent the building envelope from being overheated and increase the indoor heat load through secondary radiation and convection. In addition to greatly reducing the heat entering the room through the building envelope, it can also reduce the daily temperature fluctuation of the building envelope, thereby preventing thermal cracking of the envelope and prolonging its service life.

⑶.External building ventilation louvers can effectively prevent glare and improve the indoor light environment. Reasonable aluminium shade louvers shading measures can block direct sunlight from entering, or convert it into softer diffused light, so as to meet people's requirements for lighting quality.

⑷. External building ventilation louvers can prevent direct sunlight, especially the damage of ultraviolet rays to indoor items. Based on the above advantages, aluminium shade louvers shading technology has become a part that cannot be ignored in contemporary architectural environment design.