The main detail of the glazing is a double-glazed window. It determines the main characteristics of the window. The most important structural parameters of a double-glazed window is the thickness and number of glasses, the distance between them, as well as the presence of additional coatings.
Start the choice of a double-glazed window with the number of cameras. Each camera is a gap between two glasses. It is a layer of air or gas that provides thermal insulation. Glass is usually separated by ten to sixteen millimeters. Heat loss increases dramatically if the distance is less. Heat loss stops decreasing when the width of the chamber exceeds sixteen millimeters. Moreover, with twenty-four millimeters, they begin to increase, since convection is amplified in the space between the glasses. Convective heat transfer can be avoided if the thickness of the air retaining heat increases due to additional chambers.
The window will be warmer the more cameras there are, but a compromise must be sought. The design becomes very heavy with laminated glazing. A double-glazed double-glazed window can be kept without problems with a steel-reinforced plastic frame. The load on the fittings and fasteners should be reduced by dividing the window into several sections, if there are three cameras in the double-glazed window. In addition, amplifiers and special hinges are required already in three-chamber windows. This significantly increases the price of the product. It is also necessary to remember that the more glasses, the worse the illumination, because natural light is delayed by each layer.
Thermal insulation requirements are the main things to consider when choosing a double-glazed window. A two-chamber window is sufficient for most residential premises. Single-chamber options are usually used for auxiliary, service and other rooms in which the temperature regime may be lower.
If we are talking about regions with a harsh climate, it is worth considering double-glazed windows with three cameras. They are mounted most often in blind frames.
Not only the thickness and number of chambers determine the thermal insulation characteristics of the window. The structure of heat loss in the house is quite complex. About thirty percent of the heat is lost due to air convection inside the glazing and the thermal conductivity of the materials. The remaining seventy percent is infrared radiation passing through the glass, which is reflected from the furnishings and structural elements of the room.
Energy-saving glass has a special coating that does not transmit infrared rays. Visible light at the same time passes through them without any difficulties. Almost twice the resistance to heat loss increases if such glass is used in a double-glazed window.
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