Rooftop Unit Tasks Common for New HVAC Hires

If you’re getting started in the HVAC/R field, rooftop units (RTUs) will likely become a regular part of your workday. These all-in-one systems provide heating and cooling for large commercial buildings and are typically installed on rooftops to save indoor space.

New HVAC technicians often handle the routine tasks that keep RTUs running smoothly. That includes inspections, filter changes, and catching small issues before they turn into major repairs.

This kind of hands-on work teaches you how the systems operate, what common wear looks like, and why consistent maintenance matters. Learning these basics early builds the skills and confidence you need to grow in your HVAC career.

Overview of Rooftop HVAC Unit Components

Rooftop HVAC units are made up of several main components, and each one has a specific job in the overall system. The main parts include compressors, evaporators, condensers, and fans.

• Compressor: Moves refrigerant through the system to enable heat exchange.
• Evaporator: Absorbs heat from the building’s air to cool the space.
• Condenser: Releases the absorbed heat outside, allowing the refrigerant to cool and cycle back.
• Fans: Circulate air to maintain proper airflow and system efficiency.

Knowing how these components work together helps you perform maintenance and troubleshoot effectively. New technicians who learn these functions early are better equipped to spot potential problems and support more experienced team members on the job.

Basic Inspection Tasks for New Employees

If you’re new to the HVAC/R field, daily inspections will be part of your routine. You’ll check refrigerant levels, clean or replace filters, and look over electrical connections for signs of wear or damage. These tasks help keep rooftop units running reliably and catch small problems before they lead to system failures.

Doing these checks consistently improves performance, extends equipment life, and lowers the risk of costly repairs. Getting comfortable with these basics early in your career prepares you for more advanced diagnostic work later on.

Filter Changes and Documentation

Changing air filters is one of the most frequent jobs you’ll handle on rooftop units. Dirty filters limit airflow and force the system to work harder, which wastes energy. Replacing them regularly helps maintain efficient operation and supports healthy indoor air quality.

Documenting your work is just as important as doing it. Keeping accurate records of filter changes and other maintenance tasks ensures compliance and helps future techs understand the service history. Good documentation also shows that you’re detail-oriented and dependable—traits that employers value as you grow in the field.

What Are the First Tasks a New HVAC Hire Should Complete for Rooftop Units?

To start your career strong, focus on changing filters and performing basic inspections. These foundational tasks help you build good habits and a deeper understanding of rooftop units, preparing you for more advanced work later on. Mastering these early duties helps new hires understand how rooftop units function. It also shows a commitment to doing quality work, something supervisors notice when considering techs for more complex assignments down the line.

How Often Should Filters Be Changed in Rooftop Units?

The right filter change schedule depends on how often the system runs and the conditions around it. In most cases, filters should be replaced every one to three months. Clean filters help the system run more efficiently, support better indoor air quality, and reduce long-term wear.

Sticking to a regular filter replacement routine helps prevent avoidable damage, keeps airflow steady, and shows you’re paying close attention to system care.

What Should Be Documented During Rooftop Unit Inspections?

When inspecting rooftop units, it’s important to log each filter change, refrigerant reading, and electrical test. You should also note any unusual signs or potential issues. These records help teams monitor performance and spot patterns over time.

Accurate documentation also keeps maintenance efforts aligned, supports safety and compliance standards, and builds your reputation as a reliable technician who tracks the details.

Starting Strong in Rooftop Unit Maintenance

Understanding your responsibilities as a new HVAC/R hire sets you up for success in this line of work. By learning and performing rooftop unit maintenance tasks, you’ll help maintain efficient, safe operations while building your technical experience.

Hands-on training programs such as The Refrigeration School, Inc. (RSI) gives you experience and confidence as you grow into a skilled HVAC technician. After a trade program, successful graduates keep learning, stay curious, and continue expanding their knowledge to stay effective and adaptable in the field. 

Frequently Asked Questions

What basic skills do I need to start working with rooftop units?

You’ll need a solid grasp of HVAC fundamentals, comfort working with tools, and the ability to follow safety procedures during inspections and maintenance.

How can I prepare for a career in HVAC/R?

Enrolling in a trade school gives you hands-on training and helps build the technical knowledge needed to succeed in the field.

What training programs are available for HVAC/R technicians?

Many trade schools offer HVAC programs covering topics like rooftop unit operation, maintenance, and troubleshooting to prepare you for a successful career.