What is solar gain?

Solar gain concerns an increase in the temperature that occurs when energy from the sun passes through windows or doors. It is basically a type of greenhouse effect. It increases the temperature in the area in the same way as the glass greenhouse protects plants and flowers from the cold. Depending on the climate or seasons, it may be beneficial or harmful. New technologies and building materials can manage solar heat gain to maximize comfort and minimize the cost of energy and offices.

In the colder climate, solar profit may be beneficial and help reduce heating costs. It can also generate hot water and heat. In a warmer climate, excessive solar energy can create a thermal load that must be reduced by using air conditioning. The amount of leakage of solar energy or entry into the building can be managed using suitable materials for "phenestration" or window, doors and skylights.

Different types of phenestration glaze can keep sun heating or capture itin. In the "passive" design of solar buildings, architects use different types of tinted or coated glass to allow solar energy to make it easier to transition and capture and keep it. Phenestration can also be sealed or coated to block or repeat the solar heat far from the structure.

The system of indirect solar gain places "thermal mass", such as stone or liquid between the sun and the space to be heated. The structure is designed so that the hot air is trapped through the walls. Then he is forced to climb through the holes in the ceiling. The continuing supply of solar energy is pushing heat through the structure. With the correct wiring and insulation, warm air is still circulating.

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solar energy that enters through phenestration is measured by the solar heat (SHGC) coefficient. The lower the SHGC door or windows, the more sunlight is blockedAdions from structure. The rates of the National Rating City Hall of the National Fenies and certify the SHGC phenestration. It also evaluates and confirms the "U-factor" of phenestration materials that measure how well the material prevents heat leakage. The lower the U-Factor, the better the material stops the heat loss.

NFRC also evaluates other quality of phenestration in addition to solar gain, such as condensation and air leakage. Some states now require NFRC certification for all new constructions. NFRC believes that most builders know about certification requirements, but many suppliers do not have to. It provides free certification information to consumers.