Philadelphia-based Kapsul makes the W5, a connected window air conditioner that packs 5,000 BTUs into a seven-inch-tall design. Its patented window-frame adapter is designed for one-person installation, while built-in sensors and app, voice, and Wi-Fi controls bring smart-home features to room cooling. Kapsul says more than 8,000 units have been pre-ordered through Kickstarter and Indiegogo.