Features:

1, Airtightness

1. Corner sealing strip (rubber corner): the sealing strip shall avoid corner splicing, and the sealing strip at the corner shall be designed as a 90 degree integral rubber angle.

2. Sealing strip of frame and fan: three sealing strips should be designed at the opening part of the fan, which are the main sealing strip, the fan blank holder strip and the frame blank holder strip.

2, Anti leakage

1. The external windows must be provided with drainage channels, outlets, and vent holes (air pressure balance holes) to drain the water in the window frames. A buckle cover shall be set outside the drain to prevent strong wind from blowing rain and dust into the window sash.

2. The heat insulation strip shall be of C-type structure, and shall be on the same horizontal plane after being compounded with the internal and external aluminum profiles to avoid potential leakage and corrosion caused by water accumulation at the heat insulation strip. At the same time, the length of the heat insulation strip can be increased to improve the thermal performance.

3. Door and window opening size: the reserved size of structural opening shall not be too large to avoid potential leakage caused by plugging difficulties.

Advantages:

1.Ventilation:
Because the inverted position is another opening method of the casement window, which makes the room circulate naturally with the air of nature, and the indoor air is fresh. At the same time, it eliminates the possibility of rainwater entering the room. The fresh air undoubtedly creates a comfortable living environment for people.
2.Security:
The linkage hardware arranged around the window sash and various functions of the handle for indoor operation are fixed on the window frame when the window sash is closed, so the safety and anti-theft performance are excellent.
3.Easy to clean windows:
The operation is simple, and the window sash can be turned from the outside to the inside. The utility model makes it convenient and safe to clean the outer surface of the window.
4.Practicability:

It avoids the occupation of indoor space when the inner window is opened, and it is inconvenient to hang curtains and install lifting clothes hanging rods.
5.Good sealing and thermal insulation performance:
Through multi-point locking around the window sash, the sealing and thermal insulation effect of doors and windows are ensured.