Transom AE comes equipped with Alexa-enabled features that allow you to use your voice to take control of your home comfort via the Amazon Echo device, or through the Alexa app. Transom AE is a complete re-imagining of what a window fan should be. The air chamber abundantly draws fresh air from the outside in — or reverses electronically to exhaust stale air out. At half the height of conventional window fans, it is easy to install, blends elegantly into the space and preserves your view. Transom AE seals off windows 26” to 40” wide with the patented Soft-fit System that provides a sleek, satisfying and snug fit from end to end, without having to remove your screen.