Summary:1. Wind pressure resistance: the ability of closed outer doors and windows to avoid damage and dysfunction under wind pr...
1. Wind pressure resistance: the ability of closed outer doors and windows to avoid damage and dysfunction under wind pressure.
2. Water tightness: The ability of closed outer doors and windows to prevent rainwater from leaking under the simultaneous action of wind and rain.
3. Airtight performance: the ability of closed outer doors and windows to prevent air infiltration.
4. Air permeability per unit slit length: The amount of air passing through a unit slit length per unit time for exterior doors and windows in a standard state, and the unit is m3/m·h.
5. Insulation performance: The resistance of the door or window to transfer heat from the high temperature side to the low temperature side under the condition of the air temperature difference between the two sides of the door or window. The thermal insulation performance of a door or window is expressed by its heat transfer coefficient or heat transfer resistance.
6. Heat transfer coefficient K0: Under stable heat transfer conditions, the air temperature difference between the two sides of the door or window is 1K (absolute temperature), and the heat transfer per unit area per unit time is calculated in W/m2·K.
