The design of HVAC vent diffusers with energy efficiency in mind aims to improve the distribution of air while reducing energy use. Typically, these devices are equipped with modern features such as variable-speed fans, smart controls, and advanced shape design. HVAC equipment operates less when the air flow rate is set to specific requirements for the space, which is known to greatly reduce energy consumption. This also helps to prolong system life. In sustainable building design, energy efficient diffusers greatly contribute to achieving green building standards and reducing building operating costs.