The QuietCool QC ES-3100 Energy Saver Advanced Whole House Fan is a powerful solution for improving your home's ventilation and cooling.Ideal for small homes up to 1,541 square feet, this fan provides strong airflow with 3,081 CFM on high and 2,020 CFM on low, all while using just 285 Watts on high and 80.8 Watts on low, thanks to its energy-efficient ECM motor.This fan is a cost-effective alternative to traditional air conditioning, which can be expensive. By drawing in cooler outdoor air, it cools and ventilates your home and attic, potentially saving you up to 50 to 90% on air conditioning-related energy costs. This not only lowers your bills but also supports a healthier indoor environment.The QuietCool QC ES-3100 also enhances indoor air quality by continuously replacing stale indoor air with fresh outdoor air, reducing pollutants, allergens, and moisture buildup, and lowering the risk of mold and mildew. Properly sized, it can complete a full air exchange every 3 to 4 minutes, keeping your home fresh and comfortable.What sets the QuietCool QC ES-3100 apart is its patented design with an acoustical duct and R5 damper box. This innovative design minimizes noise and vibration, ensuring whisper-quiet operation even at high airflow. Enjoy a cool, quiet, and comfortable home with the QuietCool QC ES-3100. Color: Green. Material: Galvanized Steel.