Suncourt Door Frame Fan for Maximizing Indoor Air Circulation - Brown MAXIMIZE AIRFLOW - Capitalize on the heating and cooling potential of your air conditioner, heater, or fireplace by introducing cross-ventilation between rooms. EASY INSTALLATION - Included screw placement template makes installation simple and easy! Mounting screws are included. EFFICIENT - The Suncourt EntreeAir Door Frame Booster Fan is energy-efficient, using about the same amount of energy as a small lightbulb. UNIVERSAL FIT - Designed to fit in any door frame corner. MATCH YOUR DECOR: Available in Pearl white and brown to match your interior design.