Low-e glass provides excellent performance in situations where temperature separation is desired. Low-e is used to help energy saving requirements by blocking uv light and provide heat insulation. It is done with a special thin-film metallic and oxide coating. The coating prevents the passage of short-wave solar energy into a building also prevents long-wave energy produced by heating system and lighting from escaping outside. Type of low-e glass: Temper able high permeability and low radiation glass High transmittance - single layer glass will be over 80% , good appearance , good lighting effect. High solar transmittance - through the glass solar thermal radiation, shading coefficient >=0.5 High far infrared reflective and low heat transfer coeffici ent, exc ellent thermal insulation p Temper able shading and low radi ation glass Moderate visible light transmittance, keep a suit light effect indoor and prevent part of light from out door Lower solar transmittance coefficient.