They are found in numerous hospitals, hotel rooms, schools, and offices. They are small air-handling units paired with chilled-water and hot-water coils, with a fan to circulate heated or chilled air.

I recently commissioned a project that involved replacing eighty 2-pipe, dual-temperature fan-coil units in a nearly 40-year-old high-rise condominium. This sounded like a pretty easy assignment. How ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Editor's Note: In this weekly series, LiveScience looks at scientific aspects of the summer ...