Exterior
The appearance of a high-quality ventilation fan is usually fine workmanship, straight seams, scratches, bumps, etc. If the ventilating fan is a metal shell, it should also pay special attention to whether the paint surface of the shell is good, whether there is corrosion, rust, etc.
Air change
Different sizes and different powers of ceiling ventilation fans can provide different ventilation rates per unit of time. To purchase ventilation fans, the specific values ​​can be determined by consulting the decoration designer and the control unit's ventilation time per unit time.
Drying material
The material used for good ventilation fans is branded ABS material. The uniform density of the material is high, the surface gloss is good, and the material does not change color in a year.
Knock shell
To identify the real material of the ventilation fan, gently tap the shell, generally using a good ventilation fan shell made of materials, the sound emitted after percussion is very crisp; if it is a mixed-breathing fan shell made of mixed brand material or recycled materials, after knocking It is a dull, muddy voice.
weigh
The weight can be weighed in the most direct way. Generally, the weight of a ventilated fan is heavier than that of a fan with a poor quality.
Demolition products
Simply disassemble the product and observe whether the product is free of burrs, rags, flatness, finish, etc., and you can also see how good the internal materials are used.
Listening to noise
The scene compares the air volume and noise level of the product. It should be noted that the air volume and the noise are not the same as the fish and the paw. When comparing the noise, we must use our hand to feel the air volume of the product and then determine. Generally good quality ventilation fans can do the same in the case of the same amount of wind, the noise is lower than the general quality of the ventilation fan.
Ceiling ceiling integrated ceiling design paint
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