Yard size plays a significant role in choosing the right MPH. As a general guideline, small yards (around 1,500 sq. ft.) require an MPH range of 100-150, medium-sized yards (1,500-5,000 sq. ft.) benefit from 150-200 MPH, and large yards (over 5,000 sq. ft.) necessitate 200-250 MPH for effective debris clearing.