Spring and summer temperatures can lead many people to search for ways to stay cool while being indoors. If you have air conditioning you may be tempted to turn it on high to keep your home cool. But using AC isn’t always the best way to stay cool. Many AC systems are costly to operate and there can be a cheaper way to stay cool. Using a window fan is one of the best ways to keep your home cool, especially at night. See also10 Best Floor Fan Reviews by Consumer Report In 2020 Window fans are designed to sit in your window to pull in the air from outside. They are best used when the temperatures outdoors are mild so as not to be pulling hot air into your home. These fans also work well for those who like to sleep with a fan at night since they can bring the cooler night air inside. When choosing a window fan it’s important to know the size of your windows so you can choose one that will fit snugly and securely. The following is a list of the 10 best household window fans based on reviews by consumer report. Preview Product Holmes Dual Blade Twin Window Fan, White. Holmes HAWF2021 Buy from Amazon Bionaire BWF0910AR-WCU Remote Control Window Fan Buy from Amazon Air King 9155 Window Fan, 16-Inch Buy from Amazon Lasko Electric Reverse Window Fan W16900 16 in 16900 Buy from Amazon Air King 9166F 20" Whole House Window Fan Buy from Amazon BOVADO USA Twin Window Cooling Fan…