Shopping for windows and doors...sounds simple but buying it for a home or office requires a lot of investigating...Glass has come a long way from the olden days of just blocking the wind and allowing light in. As the energy conscious builders are looking into every aspect of building to optimize the use of heat and light naturally, glazing for windows and doors have taken a new dimension altogether.
The low emissivity glass which is typically used for insulated glass which lets light in but reduces heat is the choice of glass for energy efficient windows. Understanding different types of coatings which let in UV rays or infra red heat-rays and visible light is essential in choosing the right window for you. An informative article in Fine Homebuilding oon this topic can be read here