Space heaters on the floor are inefficient and more dangerous. You can’t leave them running without supervision, and some require so much ventilation you have to open the garage door for safety, which, after all, defeats the purpose. Hanging heaters’ compact size and ceiling mount make them perfect when you need more floor space, and they’re outdoor-rated. Most are made from sturdy, durable materials and are waterproof. They’re attractive enough to look nice on patios or gazebos, too.