Product testing of DC centrifugal fans is a crucial process to ensure their quality and performance. One of the main aspects of testing is the measurement of air flow rate. This involves using specialized equipment to accurately determine how much air the fan can move per unit of time. Different operating conditions, such as various fan speeds and system resistances, are simulated to get a comprehensive understanding of the fan's air flow capabilities. For instance, in a laboratory setting, the fan may be installed in a test duct with adjustable baffles to create different levels of resistance, and the air flow rate is measured under these different scenarios.

Another important test is the measurement of power consumption. The electrical power input to the fan is monitored to evaluate its energy efficiency. This helps manufacturers to optimize the design and ensure that the fan meets the required energy efficiency standards. Noise level testing is also essential. Excessive noise can be a nuisance in many applications, so the fan's noise output is measured in a controlled environment. The fan is operated at different speeds, and the sound pressure level is recorded using professional noise measurement equipment. Additionally, durability and reliability tests are conducted. The fan is subjected to long-term operation under different conditions to check for any signs of wear, failure, or performance degradation, ensuring that it can provide reliable service over its expected lifespan.