Comprehensive Guide to Rooftop Packaged Units (RTU): Components, Functions, and Benefits
A rooftop packaged unit (RTU) is an HVAC system that integrates all essential components needed for air conditioning into a single, compact unit. Typically installed on the roof, these units are connected to ductwork that delivers conditioned air throughout the building while also channeling the return air back to the RTU.
The unit is generally housed in a large metal enclosure, which contains key elements such as:
Expansion device
Evaporator
Compressor
Air-cooled condenser
Controlled by a basic thermostat, RTUs can also serve specialized functions. For instance, some models are designed to condition 100% outdoor air, meaning they operate solely with fresh air intake and avoid recirculating indoor air. These systems, known as dedicated outdoor air units (DOAU) or make-up air units, require enhanced insulation, extra components, and potentially higher energy consumption to meet their specifications.
All parts of a rooftop packaged unit are enclosed within a single cabinet located on the roof and are directly connected to the building's ventilation system. These units can function as both cooling and heating systems, or as air conditioners only, depending on configuration.
Trosten Industry offers a broad range of modern RTUs, utilizing ozone-friendly refrigerants. Their commitment to quality and customer satisfaction ensures reliable service across the China and all over the world!
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