July 21, 2025
Commercial and industrial buildings in Ajman frequently choose rooftop HVAC systems, particularly rooftop package units, because of their integrated performance and space-saving design. However, these systems frequently experience operational challenges in the UAE’s intense heat and dusty environment. Ignoring these issues can result in less comfortable indoor conditions and expensive malfunctions.
This blog will discuss the most prevalent rooftop HVAC issues in Ajman, their effects on businesses, and practical solutions. This manual is specifically designed for HVAC maintenance supervisors, industrial property owners, and managers of commercial facilities.
What Is a Rooftop Package Unit?
A rooftop package unit is a compact HVAC system that combines heating, ventilation, and air conditioning components. It is typically placed on a building’s roof. For warehouses, shopping centers, and office buildings in Ajman, rooftop units are the best option because they are simpler to install and maintain than split systems.
According to Wikipedia, these units are designed for centralized temperature control with minimal indoor equipment.
At BestAir Services, we provide installation and repair of rooftop package units specifically tailored for Ajman’s harsh environmental conditions.
1. Overheating Due to Poor Ventilation
Rooftop units are vulnerable to overheating in Ajman because summer temperatures frequently surpass 45°C (113°F). Compressors and electrical components are at risk when these systems are installed without adequate ventilation or sun-shielding measures.
🔥 Preventive measures:
- Reduce heat absorption by installing reflective coatings or shade panels.
- Plan for twice-yearly HVAC maintenance, particularly prior to the hottest months of the year.
2. Coil Corrosion from Coastal Air and Dust
Over time, rooftop HVAC coils corrode due to the salty air from Ajman’s closeness to the sea. This causes rust accumulation and decreased thermal conductivity, especially when combined with the UAE’s frequent sandstorms.
🛠️ Preventive:
- Condenser coils should be coated with anti-corrosive materials.
- Every month, clean them and use protective filters.
- For new units, choose coils coated with epoxy or aluminum fins.
Using rooftop package units with marine-grade coating systems is what we advise for long-term protection.
3. Clogged Air Filters and Ducts
One of the most common rooftop HVAC issues in Ajman is dust buildup in filters and ductwork. Due to poor indoor air quality, this not only lowers cooling efficiency but also poses health risks.
😷 Impact:
- increased energy use (by as much as 15%).
- respiratory distress in both employees and guests.
🧹 Preventive measures:
- During the summer, change the air filters once a month.
- Hire a certified company, such as BestAir, to clean your ducts every three months.
Check out our HVAC duct maintenance services for industrial properties.
4. Electrical Malfunctions in Rooftop Units
Electrical components expand and contract in response to humidity and high temperatures. Due to their complete exposure, rooftop HVAC systems are vulnerable to circuit board burnout, wiring problems, and capacitor failures.
💡 Preventive measures:
- Every six months, perform infrared electrical inspections.
- Use IP-rated enclosures and seal all junction boxes.
As per the U.S. Department of Energy, regular electrical inspection can reduce unexpected failures by 70% (DOE Source).
5. Improper Refrigerant Charge or Leaks
Rooftop package units’ performance can be severely harmed by low refrigerant levels brought on by leaks or incorrect charging during installation.
❄️ Signs and symptoms:
- uneven cooling in different areas.
- increased costs for utilities.
- accumulation of frost on coils.
🛠️ Preventive measures:
- Your annual HVAC service agreement should include checks for refrigerant levels.
- For a precise diagnosis, use pressure-sensitive leak detectors.
6. Faulty Drainage and Condensation Overflow
In rooftop HVAC units, clogged condensate lines or drain pans can cause water to pool, rust the unit base, and cause mold problems.
🌧️ Preventive measures:
- Drainage lines should be cleared every three months.
- Install float switches so that, in the event of an overflow, the system will automatically shut off.
7. Inconsistent Maintenance Schedules
Lack of regular, expert maintenance is one of the main reasons why most HVAC systems fail. This is even more important in industrial settings where downtime equates to lost revenue.
📅 Preventive measures:
- Put in place a computerized maintenance management system (CMMS).
- Join forces with BestAir Services, a commercial HVAC provider that provides proactive scheduling.
Why It Matters for Commercial & Industrial Facilities
Air conditioning outages can result in:
- product deterioration in storage spaces.
- decreased output as a result of workers’ discomfort.
- Server rooms and machinery areas are experiencing overheating.
A case study by the ASHRAE Journal shows that preventive maintenance of rooftop units can reduce total energy costs by 10-30% annually.
BestAir’s Expert Rooftop HVAC Solutions in Ajman
We are aware of the unique operating requirements, legal requirements, and climate of Ajman’s businesses. Our group of qualified technicians provides:
- Installing rooftop package units with superior performance
- Plans for scheduled HVAC maintenance
- Rooftop AC emergency repair
- Energy audits and sophisticated diagnostics
Explore our Rooftop HVAC Services to learn more.
Final Thoughts
For effective and space-saving climate control in Ajman’s business sector, rooftop HVAC units are a great option. However, they are only as good as the upkeep that supports them. Proactive inspections, the use of sturdy parts, and collaboration with experts who are aware of local difficulties are the first steps in preventing common rooftop HVAC issues.
Contact BestAir Services, your go-to source for industrial climate solutions, for customized rooftop HVAC service in Ajman.