Baseboards tick. Radiators hiss. And when a forced-air system switches from off to on, it can sound like an airplane roaring down the runway. In today's world, silence isn't easy to come by. That must be why, when shopping for household appliances like dishwashers, we seek out the quietest models. In the past, homeowners didn't have the same expectations for heating systems, but that's changing. As much as homeowners appreciate the comfort and efficiency benefits of in-floor heating, some value its quietness even more. It doesn't just make less noise—it operates silently.