Skylight / November 14, 2018 / Onfroi Berger.
This heat gain can be minimized by installing your south-facing skylight in the shade of deciduous trees or adding a moving window covering. Skylights come in all shapes and sizes. Its size greatly affects the illumination level and temperature of the space below. As a rule of thumb the size of a skylight should never be more than 5% of the floor area in rooms with many windows; and no more than 15% of the rooms total floor area for spaces with few windows. Dept. of Energy. Glazing Like windows skylight manufacturers use different types of glazing to improve their energy efficiency. The glazing comes in three different forms. Plastic glazing - This type of glazing is usually inexpensive and less likely to break than other glazing materials.
Angled where the shaft is parallel to the pitch of the skylight. It too is the same dimension as the skylight but its straight-in angle offers more light than a straight shaft. Angled shafts also are used to connect two locations that cannot otherwise be aligned. This occurs when the skylight must be installed in a particular spot - between two trusses for example - and the shaft opening is likewise limited to a particular location on the ceiling that is not directly under the skylight. Splayed or pyramid in which the ceiling opening is larger than the skylight opening in width length or both. This type although a little harder to construct is the most popular simply because it allows a smaller skylight to illuminate a larger area.
For one thing skylights are positioned in such a way that they are inaccessible unless they are operated by remote. Even in cases of motorized skylights which are easily manipulated there are still some disadvantages that are inherent to skylights that are not present or minimized in windows. Vertical windows lose less heat by convection when compared to skylights. Also since windows are generally protected by overhangs or shrubs they lose less heat by radiation. On the other hand skylights are directly exposed to the sky. Thus they lose more heat by radiation. Proper insulation can reduce this heat loss to a large extent. In the summer season skylights are more exposed to the direct heat of the sun than windows.
Solar heat control glazing - Manufacturers use various glazing methods to reduce the impact of summer time solar heat gains and winter time heat losses. These come in the form of heat-absorbing tints double and tripled paned skylights and low-emissivity coatings. Slope When your window professional installs your skylight one of the factors they will take into consideration is the slope. The slope or tilt of the skylight affects the amount of solar heat gain. A low slope on your skylight admits more solar heat in the summer and less in the winter which is the opposite of the effect you are trying to achieve As a rule of thumb you want to achieve a slope equal to your geographical latitude plus 5 to 15 degrees.