For fan purchases, I think many people do not know what factors to consider when buying a fan. As a result, many people make their purchases without much guidance. To help users better understand how to select a fan, we have summarized several points to consider during the purchasing process.
1. Be sure to determine the fan's specifications, model, and performance parameters (airflow, air pressure, power, and rotational speed) based on the area of the site;
2. Generally, unless otherwise specified, the voltage of a ventilator is 380V. If you have special requirements, be sure to state them when ordering to avoid returns after shipment and unnecessary costs;
3. When purchasing a fan, be sure to confirm whether it comes with accessories such as an electric control box, flange (round flange), vibration isolator (suspended or floor-mounted), rainproof louver, elbow, insect screen, flexible connector, silencer, and silencer housing;
4. Before purchasing a fan, please clarify its installation location, operating environment characteristics, frequency of use, and other information so that you can select a suitable fan model.
5. When purchasing a cabinet fan (fan box), specify the locations of the fan's air inlet and outlet, and whether the motor is built-in or externally mounted;
6, when purchasing a centrifugal fan, specify the drive type, direction of rotation, and outlet angle, and whether it should include a vibration isolator and vibration-isolating base (C-type, D-type, and E-type units generally should include these);
7, a simple drawing must be provided for the sound-attenuating plenum box. Specify whether fire dampers and multi-blade air supply outlets are normally open or normally closed, as well as their required functions. For louvered outlets, specify the blade shape or function;
8, flange dimensions for fan and valve product outlets are designed for galvanized steel ductwork. If composite ductwork such as glass-magnesium ductwork has special requirements for the mating flanges, please specify them;
Note: Before purchasing a fan of any model, be sure to inform the supplier in advance of any special requirements to avoid losses from return or exchange costs.
The above are several important points to consider when selecting these types of fans. We hope they will be helpful to users.