The composite filter element integrates multiple filtration technologies to achieve an efficient, low maintenance, and multifunctional air purification solution. It has a wide range of application scenarios, covering everything from daily household protection to industrial level purification needs. Consumers should consider their own needs (such as pollutant type, usage scenario, budget) when making choices, with a focus on filter grade, CADR/CCM value, and post maintenance costs to achieve the best cost-effectiveness.