Rooftop HVAC Unit Services
in Lawrenceville, Gwinnett County, & Metro Atlanta
Commercial Rooftop HVAC Units in Lawrenceville, GA Built for Business Performance
When a rooftop unit fails, comfort issues quickly turn into lost productivity, unhappy customers, or disrupted business operations. Many Lawrenceville businesses struggle with aging RTUs, rising energy costs, or inconsistent building temperatures. Our trusted commercial HVAC contractors at B Mays Heating and Air Conditioning provide professional rooftop HVAC unit services. We handle rooftop unit installation, repair, and maintenance with minimal downtime, helping businesses maintain reliable heating and cooling all year round.
- Minimize Business Downtime
- Reliable Building-Wide Comfort
- Energy-Efficient Operation
- Commercial-Grade HVAC Expertise

Day Availability
Local Owned
Years of Experience
Don’t Let A Rooftop Unit Malfunction Slow Your Lawrenceville Business Down
When your rooftop HVAC unit’s performance affects daily operations, fast service matters. Our reliable commercial HVAC technicians deliver dependable rooftop unit services, helping Lawrenceville businesses restore comfort quickly, improve efficiency, and keep operations running without unnecessary downtime.
Why B Mays Heating and Air Conditioning Is Lawrenceville’s #1 Choice for Commercial HVAC Services
Your Trusted Local Partner for Commercial Rooftop HVAC Unit Service
B Mays Heating and Air Conditioning is a local, family-oriented commercial HVAC company trusted by businesses throughout Lawrenceville and the nearby Gwinnett County areas. Our certified commercial HVAC professionals specialize in rooftop unit installation, repair, and replacement. With responsive scheduling, clear communication, and experience across offices, retail, and warehouses, we keep rooftop HVAC systems reliable, efficient, and aligned with real-world business demands.
Round-the-Clock
Available Commercial
HVAC Technicians
Precision-based
Specialized
Commercial HVAC
professionals
Certified Service
Local to
Lawrenceville
Red Flags You Need Rooftop HVAC Unit Maintenance in Lawrenceville
Commercial rooftop units rarely fail without warning. Small performance issues can quickly lead to uncomfortable workspaces, rising energy costs, or unexpected downtime. Identifying these warning signs early helps Lawrenceville businesses schedule rooftop HVAC tune-ups before minor problems escalate into costly disruptions.
Inconsistent Temperatures Across the Building
If some areas feel too hot while others stay cold, your rooftop unit may be struggling with airflow or capacity issues. Our reliable commercial HVAC maintenance technicians diagnose distribution problems and restore balanced, building-wide comfort.
Rising Energy Bills Without Increased Usage
Sudden spikes in energy costs often signal an inefficient or aging rooftop unit. Our commercial HVAC tune-up specialists inspect system performance, identify energy loss, and recommend repairs that improve efficiency and reduce operating costs.
Unusual Noises or Vibrations
Grinding, rattling, or excessive vibration coming from a rooftop unit can indicate failing components. Our rooftop HVAC service professionals investigate mechanical issues early to prevent major equipment damage.
Frequent Breakdowns or Emergency Calls
Repeated service calls usually mean your rooftop unit is nearing the end of its reliable life. Our commercial heating and cooling contractors evaluate system condition and provide repair or replacement guidance to protect business operations.
We Install All Types of Commercial Rooftop HVAC Units in Lawrenceville, GA

Packaged Rooftop HVAC Units
Packaged rooftop units combine heating and cooling into one efficient system, making them ideal for offices, retail stores, and warehouses. Our commercial HVAC installers size and install RTUs correctly to deliver reliable, building-wide comfort while keeping energy use and operating costs under control for Lawrenceville businesses.

Gas/Electric Rooftop Units
Gas/electric rooftop units use gas heat and electric cooling for dependable year-round performance. They’re a popular choice for many commercial properties. As experienced commercial HVAC contractors, we install these systems with proper ventilation, controls, and safety measures to ensure efficient, code-compliant operation from day one.

Heat Pump Rooftop Units
Heat pump rooftop units provide both heating and cooling in a single, energy-efficient system. They’re ideal for businesses looking to simplify equipment and reduce costs. Our rooftop HVAC installation team designs and installs heat pump RTUs that deliver consistent comfort across changing seasons.

Single-Zone Rooftop Units
Single-zone rooftop units control temperature for one large commercial space, such as open offices or retail floors. Proper sizing is critical for performance. As Lawrenceville commercial HVAC specialists, we install single-zone RTUs that deliver steady airflow, balanced temperatures, and dependable comfort throughout the entire space.

Multi-Zone Rooftop Units
Multi-zone rooftop units serve multiple areas from one system, making them ideal for buildings with varied comfort needs. Our commercial HVAC installers design zoning layouts carefully, ensuring each area receives the right airflow and temperature control without overworking the system.

Variable Air Volume (VAV) Rooftop Units
VAV rooftop units adjust airflow based on demand, improving efficiency in larger commercial buildings. These systems require precise installation. Our commercial HVAC professionals install VAV RTUs with properly calibrated controls and sensors to maximize energy savings and comfort across all occupied areas.

High-Efficiency Rooftop Units
High-efficiency rooftop HVAC units help businesses reduce energy consumption and operating costs. Installation quality directly impacts performance. Our rooftop HVAC contractors install high-efficiency RTUs correctly, ensuring optimal airflow, proper controls, and long-term efficiency benefits for Lawrenceville commercial properties.

Replacement Rooftop Units for Aging Systems
Older rooftop units often struggle to meet modern comfort and efficiency standards. Our commercial HVAC installation team replaces outdated RTUs with modern systems designed for today’s business needs, minimizing downtime and delivering reliable heating and cooling that support daily operations.
Fast Commercial Rooftop Unit HVAC Services in Lawrenceville, GA
Rooftop Unit Problems? Our Commercial HVAC Team Is Ready 24/7
When a rooftop unit impacts your business, delays cost money. Our Lawrenceville commercial HVAC contractors are available 24/7 to respond quickly. We assess rooftop unit issues fast and deliver same-day solutions that restore comfort and keep your operations moving.
What Fast Rooftop HVAC Service Really Means
Fast commercial rooftop HVAC service means prompt scheduling, efficient rooftop access, and accurate diagnostics on the first visit. Our experienced commercial HVAC technicians in Lawrenceville explain options clearly and complete work efficiently, minimizing disruption while protecting system performance and building comfort.
Same-Day Commercial Repairs, Minimal Downtime
Business downtime isn’t an option. That’s why our rooftop HVAC services are designed for speed and reliability. Day or night, weekdays or weekends, we provide same-day commercial rooftop HVAC repairs and service to keep Lawrenceville businesses comfortable and operational.
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Professional Rooftop HVAC Maintenance Services in Lawrenceville, GA
Don’t Let Small Rooftop Unit Issues Disrupt Your Business!
Commercial rooftop HVAC units work year-round to keep employees, customers, and tenants comfortable. Without routine rooftop unit HVAC maintenance, worn components, airflow issues, and control problems can quietly reduce efficiency and lead to unexpected breakdowns. Regular heating and cooling system maintenance helps Lawrenceville businesses prevent costly downtime, extend equipment lifespan, and maintain reliable, efficient heating and cooling throughout every season. With reliable commercial HVAC maintenance, we help your business, tenants and customers stay comfortable all year-round.
Reduce Operating Costs
Prevent Surprise Shutdowns
Extend Equipment Lifespan
Maintain Consistent Comfort
Protect System Efficiency
What’s included in our rooftop HVAC maintenance service?
Our rooftop HVAC maintenance service is designed for commercial reliability. Our commercial HVAC specialists in Lawrenceville inspect belts, motors, coils, burners, and electrical components, test controls and safety systems, check refrigerant levels, and verify airflow performance. This thorough approach helps catch problems early, improve efficiency, and keep rooftop units operating dependably for Lawrenceville businesses.The right time for rooftop unit HVAC maintenance
The best time to schedule rooftop unit HVAC maintenance in Lawrenceville and nearby Gwinnett County areas is before peak heating or cooling seasons. Pre-season service prepares rooftop units for heavier demand and helps avoid emergency repairs during busy business hours. With flexible scheduling and maintenance plans, we make it easy for Lawrenceville businesses to protect comfort and operations year-round.
We Repair All Parts That Commonly Break Down in Commercial Rooftop HVAC Units in Lawrenceville, GA
Compressors
The compressor is the heart of a rooftop HVAC unit, circulating refrigerant for heating and cooling. When compressors fail, systems lose capacity or shut down entirely. Our trusted commercial heating repair technicians in Lawrenceville diagnose electrical or mechanical failures and complete repairs or replacements to restore reliable rooftop unit performance.
Condenser Fan Motors
Condenser fan motors release heat from the system. Worn bearings or motor failure can cause overheating or shutdowns. Our experienced rooftop HVAC repair professionals inspect, service, or replace fan motors to restore proper heat transfer and protect compressors from further damage to your Lawrenceville business heating and cooling systems.
Evaporator and Condenser Coils
Coils handle heat exchange and airflow. Dirt buildup, corrosion, or leaks reduce efficiency and comfort. Our reliable commercial HVAC repair specialists in Lawrenceville clean, repair, and restore coils to improve airflow, energy efficiency, and overall rooftop unit reliability.
Belts and Pulleys
Belts and pulleys drive internal components like blowers. Over time, belts stretch or crack, causing airflow loss. Our certified rooftop unit repair contractors in Lawrenceville inspect and replace worn belts to maintain proper airflow and consistent building-wide comfort.
Gas Burners and Heat Exchangers
In gas rooftop units, burners and heat exchangers generate heat. Cracks or ignition issues can impact safety and performance. Our trusted commercial heating and cooling service technicians in Lawrenceville inspect, repair, and ensure safe operation to restore dependable heating.
Control Boards and Sensors
Control boards and sensors manage system operation and safety. Electrical failures can cause erratic performance or shutdowns. Our trusted commercial HVAC service providers in Lawrenceville troubleshoot controls, replace faulty components, and restore accurate system response.
Dampers and Actuators
Dampers regulate airflow within rooftop units and duct systems. When actuators fail, comfort becomes uneven. Our expert Lawrenceville rooftop unit HVAC specialists repair damper controls to restore balanced airflow and proper temperature distribution.
Electrical Connections and Contactors
Loose wiring or failing contactors interrupt power delivery. These issues can prevent a startup or cause short cycling. Our reliable Lawrenceville commercial heating and cooling experts in Lawrenceville inspect and repair electrical components to ensure safe, reliable rooftop unit operation.
Lawrenceville, GA’s Local Commercial Rooftop HVAC Experts
B Mays Heating and Air Conditioning proudly serves Lawrenceville businesses with dependable commercial rooftop HVAC services. Our team understands local building codes, rooftop access requirements, and the demands of Georgia’s heat and humidity on commercial systems. That local experience allows our commercial HVAC professionals to install, service, and maintain rooftop units efficiently, helping Lawrenceville, Duluth, Suwanee, and Loganville businesses stay comfortable, compliant, and operational year-round.
Primary ZIP codes we serve with dependable rooftop HVAC unit services in Lawrenceville, GA
30043
30044
30045
30046
30049
Seasonal Factors That Affect Rooftop HVAC Units in Lawrenceville, GA
Lawrenceville’s climate creates year-round demands on commercial rooftop HVAC units. From heavy pollen and humidity to extreme heat and winter cold snaps, local conditions directly impact performance, efficiency, and reliability. Understanding how each season affects rooftop HVAC units helps businesses plan maintenance and repairs that prevent downtime, control costs, and protect indoor comfort.

Spring
Pollen Buildup & Airflow Restrictions
Spring brings heavy pollen levels across Lawrenceville, which can quickly collect on filters, coils, and intake areas of rooftop HVAC units. This buildup restricts airflow, reduces efficiency, and forces systems to work harder. Without timely rooftop HVAC maintenance, small airflow issues often turn into repair needs just as cooling demand begins to rise.

Summer
Extreme Heat & Peak Cooling Demand
Hot, humid Lawrenceville summers push commercial rooftop HVAC units to operate at maximum capacity for extended periods. Dirty coils, low refrigerant, worn belts, or failing motors often surface during this season. Proactive rooftop HVAC maintenance and fast repair services are critical to prevent system failures that disrupt employees, customers, and daily business operations.

Fall
System Recovery & Preventive Maintenance
Fall is a key season for rooftop HVAC unit maintenance in Lawrenceville. After months of heavy cooling use, components may be worn or out of calibration. Preventative maintenance and minor rooftop HVAC repairs during the fall help correct summer damage, restore efficiency, and prepare systems for reliable heating performance as temperatures drop.

Winter
Heating Performance & Cold Snaps
Winter cold snaps place sudden demand on heating components inside rooftop HVAC units. Faulty burners, ignition issues, airflow restrictions, or control failures often appear during the first cold stretches. Prompt rooftop HVAC repairs ensure commercial buildings stay warm, safe, and operational throughout Lawrenceville’s coldest periods.
Seasonal rooftop HVAC unit maintenance and timely repairs help B Mays Heating and Air Conditioning keep Lawrenceville businesses comfortable, efficient, and protected all year long.
Looking for Reliable Commercial Rooftop HVAC Services Near Me? Proudly Serving Lawrenceville & Nearby Gwinnett County Areas
We help Lawrenceville businesses stay comfortable with reliable rooftop HVAC unit services. From the high-rise buildings near Downtown Lawrenceville and the Gwinnett County Courthouse area to offices, restaurants, and cafes in Sugarloaf Mills, Coolray Field, and nearby business corridors, our local commercial HVAC team delivers fast service that keeps operations running smoothly.
Notable Places and Landmarks in Lawrenceville, GA:

Commercial Rooftop HVAC Units FAQs
Commercial rooftop HVAC units, often called RTUs, are packaged heating and cooling systems installed on the roof of commercial buildings. They provide centralized heating and cooling for offices, retail spaces, warehouses, and restaurants. Rooftop HVAC units distribute conditioned air through ductwork while saving indoor space and improving efficiency. Professional commercial HVAC contractors install and service these systems to ensure reliable building-wide comfort.
Rooftop HVAC units are ideal for many commercial properties, including office buildings, retail stores, restaurants, warehouses, medical offices, and multi-tenant spaces. Businesses choose rooftop HVAC systems because they deliver consistent heating and cooling, simplify maintenance access, and reduce indoor noise. Commercial rooftop HVAC units are especially effective for larger spaces that need dependable, centralized climate control.
Commercial rooftop HVAC units should receive professional maintenance at least twice per year, typically before peak cooling and heating seasons. Regular rooftop HVAC maintenance helps prevent unexpected breakdowns, improves energy efficiency, and extends equipment lifespan. Routine service by experienced commercial HVAC technicians also allows early detection of worn components before costly rooftop HVAC repairs are needed.
Common signs include uneven building temperatures, rising energy bills, unusual noises, short cycling, weak airflow, or frequent system shutdowns. These issues often indicate failing components inside rooftop HVAC units. Scheduling prompt rooftop HVAC repair services helps businesses in Lawrenceville avoid system downtime, protect indoor comfort, and prevent more expensive equipment damage.
Many rooftop HVAC unit problems can be repaired, especially when issues are caught early. Commercial HVAC specialists evaluate system age, efficiency, and repair history before recommending solutions. In some cases, repeated repairs or declining efficiency may make rooftop HVAC replacement a better long-term option for businesses seeking reliable heating and cooling performance.
Yes. Commercial rooftop HVAC issues can disrupt operations at any time. Our commercial HVAC contractors provide fast-response and emergency rooftop HVAC services in Lawrenceville to restore heating and cooling quickly. From urgent rooftop HVAC repairs to system troubleshooting, we help businesses minimize downtime and maintain a comfortable, productive environment year-round.
B Mays Customer Stories
See What Our Clients Are Saying


Brandon was absolutely phenomenal! We called him for a 2nd opinion on our AC blowing hot and not only did he get us in faster, he found the real issue and got us cool in no time. Incredibly grateful, and will recommend him to any friends and family without hesitation. Thank you so much! We can enjoy our home again!







