The Master MHD-30W high velocity wall fan delivers fresh air quickly to localized spaces. Great for spaces with or without air conditioning, this wall fan can take the edge off of your monthly energy bill by allowing you to use the A/C more sparingly. And with our efficient direct drive design, you'll conserve even more electricity. It also has three speed settings and features a heavy-duty, all-metal construction. Whether it's a warehouse, garage, barn, or a crowded summer gathering, the Master MHD-30W high velocity wall fan is an efficient way to cool all types of spaces.