The Difference Between Rooftop Units and Air Handling Units
When it comes to commercial HVAC systems, two common components you’ll often hear about are Rooftop Units (RTUs) and Air Handling Units (AHUs). While both play crucial roles in maintaining comfortable indoor environments, they serve different purposes and are suited for different applications. Understanding the difference between these two can help you make informed decisions when it comes to your building’s heating, ventilation, and air conditioning needs.
Rooftop Units (RTUs)
Rooftop Units are self-contained HVAC systems typically installed on the roof of commercial buildings. As all-in-one units, they combine heating, cooling, and ventilation in a single package. RTUs are popular in commercial settings due to their efficiency, ease of installation, and ability to save space within the building.
RTUs draw in outside air, filter it, and either heat or cool it before distributing it throughout the building via ductwork. Because they are placed on the roof, they help free up valuable indoor space and reduce noise levels within the building. Additionally, RTUs are often more accessible for maintenance since technicians can service them without disrupting the building’s occupants.
RTUs are ideal for medium to large-sized commercial spaces, such as retail stores, schools, and office buildings. They are designed to handle significant loads and can be customized with various options like energy recovery systems and economizers, which can improve energy efficiency.
Air Handling Units (AHUs)
Air Handling Units, on the other hand, are a component of a larger HVAC system and are typically installed inside the building. AHUs do not include heating or cooling elements themselves; instead, they are responsible for circulating and regulating air within the building.
AHUs work by drawing in air, filtering it, and then either distributing it directly into the building or sending it to other components, like chillers or boilers, for temperature adjustment. Once the air is conditioned, the AHU distributes it throughout the building.
AHUs are highly customizable and can be designed to meet specific needs, such as humidity control, air filtration, and specialized ventilation requirements. They are often used in buildings where precise environmental control is essential, such as hospitals, laboratories, and manufacturing facilities.
Key Differences
The primary difference between RTUs and AHUs is their function and location. RTUs are complete HVAC systems installed on the roof, ideal for general commercial use. In contrast, AHUs are components of a larger system, located inside the building, and are used for more specialized air handling needs. RTUs are more straightforward, while AHUs offer more customization and are used in environments where air quality and precise control are critical.
While both RTUs and AHUs are essential in commercial HVAC, choosing the right one depends on your building’s specific needs. For general heating, cooling, and ventilation, an RTU may be sufficient. However, if you require more specialized air handling capabilities, an AHU is the better choice. To learn more or to schedule an HVAC service, contact the experts at Fritch Heating & Cooling, Inc. today!