Rooftop Package Units provide air conditioning and heating and, maintain indoor air quality and comfort to the occupants of the building. Rooftop Package Units allow the introduction of outside air into, and the exhausting of air from the building. In temperate climates, mixing the right amount of cooler outside air with warmer return air can be used to get to the desired supply air temperature. A mixing chamber which has dampers for controlling the ratio between the return, outside, and exhaust air is used for this purpose.

Rooftop Package Units are typically a large metal container that includes a blower, heating or cooling elements, filter racks or chambers, sound attenuators, and dampers. Rooftop Package Units connect to a ductwork ventilation system that distributes conditioned air throughout the building.

The layout for the placement of the Rooftop Package Units on a newly constructed building must include the consideration of several important elements such as structural support, sound attenuation, ductwork routing and access to the utilities for mechanical connection. Rooftop Package Units are most commonly used in large commercial applications.

Smaller air handlers are called terminal units, and may only include an air filter, coil, and blower. A larger air handler that conditions 100% outside air, and no recirculated air, is known as a makeup air unit (MAU). An air handler designed for outdoor use, typically on roofs, is known as a packaged unit (PU) or Rooftop Package Unit.”

Select Mechanical can help with your Rooftop Package Unit system design and installation. To arrange a consultation, please call our offices at 925-447-1500 or send us a request for an estimate; bids@selectmechanical.net