This air blower pump fan is designed for medium to large inflatable bounce houses. The power rating of the inflatable bouncer blower is 735 watts which is 1.0 horsepower. It's great for other construction applications as well such as drying wet carpet, blowing off sidewalks, or cleaning up leaves in the yard. Likewise, the 4-1/4" (outside) air outlet diameter, quickly filling, and great airflow ensure this air blower pump fan works well with outdoor bounce houses, water slides, obstacle courses, air sofas, and other suitable inflatable bouncers.