Squirrel cage fans, especially those rated at 465 cubic feet per minute (CFM), are essential components in many ventilation, heating, and cooling systems. Their unique design, versatility, and ability to move significant volumes of air make them a popular choice in both residential and industrial environments. But when it comes to efficiency, how do these fans perform, and what factors influence their effectiveness? This comprehensive guide will explore the efficiency of squirrel cage fans 465 CFM, including their design, operation, maintenance, and best practices for maximizing performance.