The doors and windows of the building are part of the outer structure of the building and the most sensitive part of the heat exchange of the building. The energy consumption per unit area of the building is five or six times that of the wall. The heat loss of doors and windows accounts for more than 40% of the total building. There are three ways of heat loss outside the building: firstly, heat conduction loss through aluminum alloy profiles;.Secondly, radiation heat loss through the glass.And thirdly,the air convection heat loss through the gap of doors and windows. Therefore, pull handles suppliers will tell you that the manufacture of heat preservation and energy saving aluminum alloy doors and windows should be considered from these three aspects.
1. Aluminum alloy section.Aluminum alloy material is a good conductor of heat, the thermal conductivity is mostly high. To make thermal insulation glass, choose the profile that has insulated bridge treatment, that is, the heat conduction path of the partition material, to achieve the purpose of thermal insulation.
2. Glass.Heat preservation and heat insulation doors and Windows need to adopt hollow glass, because the cavity between the hollow glass filled with dry, in the stillness of the air, the thermal conductivity greatly reduced, thus insulating glass has excellent heat insulation, sound insulation and resistance to frost condensation,  performance of commonly used the glass thickness of the hollow glass 5 ~ 6 mm, common cavity thickness is 9 mm and 12 mm.
Sealing material.Thermal insulation of windows and doors with sealant should be chosen the weather resistance rubber, sealing strip should be chosen the one with good ozone corrosion resistance and anti ultraviolet ageing performance of neoprene products, door and window opens overlap part above to set up three sealing strip.