How do Low-E coatings work?
Low-E coatings help to reduce heat from escaping the interior of a home in the winter. The goal of a Low-E coating is to improve total home comfort, with the added bonus of reducing energy costs.
Low-E coatings for cold northern climates or north orientate are designed for regions with cold climate. It allows large amounts of solar heat and natural light into a room. It is also possible to use for other regions, if the orientation of the building / facade is northern and there is little solar heat.
Low-solar-gain multifunctional coatings are designed for hot southern climates to allow a minimal amount of solar heat to enter a room while permitting moderate amounts of natural light. It helps to keep heat inside in winter as well.