We have a large 500 square foot room that got little to no a/c going through it. It is where my wife works for the past couple of years and she has been miserable through some hot summers. Not that we haven't tried to make the room more comfortable for her. This unit has made a significant change that can be felt instantly. Very happy with this product! My phone interaction with customer service was excellent! You can easily tell that this company cares about their customers and I thank you!