First, determine whether the four sides of the hole are vertical. Measure the width of this hole. Measure the width of the hole from left to right. The narrowest dimensions at the top, middle and bottom of the window are the final measurement dimensions. Height: Measure the height of the window opening from top to bottom, and the narrowest dimension among the left, middle and right window openings is the final height. The final height and width are deducted from 3 mm to 6 mm, and the final size is the final size of the ventilation shutter.
2, manual ventilation shutter installation method
First, install the louver frame in the hole. If the inner wall of the hole is a concrete wall, 12 cm expansion screw can be used to directly drive into the wall from the inside of the frame, and 8 cm expansion screw can be used to drive into the wall from the upper and lower beams. If the inner wall of the hole is square steel, aluminum alloy frame, wooden frame, etc. , can be directly fixed with dovetail screws. Pay attention to tightness when tightening, and adjust the louver frame so that it is not deformed and vertical on all sides. After the window frame is fixed, the internal sundries must be cleaned up before the blinds are installed. Adjust the blade holder to see if the blade is in place. Then the whole opening and closing debugging for three times. When closed, the blade should be kept horizontal to ensure the sealing effect and opening angle.
Step 3 Apply sealant
The gap between the louver frame and the edge of the hole is sealed with sealant, and paper needs to be stuck on the edge of the window frame hole to ensure that there is no glue left between the window frame and the edge of the hole, and the glue should be flush, even and beautiful. Clean up the surrounding sundries and install ventilation shutters.