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BMS Controls Glossary

Roof Top Unit

A roof top unit (RTU) is a self-contained heating and cooling system often found on the roofs of commercial and industrial buildings. It is responsible for providing air conditioning, ventilation and other services to the interior of the premises. RTUs are designed to be powerful, efficient and reliable systems that provide essential comfort and safety for building occupants. They range in size from smaller residential units to large commercial units capable of serving hundreds of people per hour. With their ability to heat, cool, dehumidify, and filter air, RTUs play an important role in the well-being and productivity of businesses, schools and homes.