How to Protect Your Commercial HVAC System During a Heatwave
When temperatures surge, commercial HVAC systems face extreme demand. Buildings heat up faster, equipment runs longer, and even small inefficiencies can turn into major comfort issues. During a heatwave, staying proactive isn’t just smart: it’s essential for preventing downtime, protecting your equipment, and keeping your tenants, employees, or customers safe.
If you manage a building, facility, or commercial space, these heatwave HVAC tips will help you stay ahead of the strain and avoid costly emergency repairs.
1. Replace Air Filters More Frequently
Heatwaves push HVAC systems to their limits. Dirty or clogged filters restrict airflow, causing the system to run hotter and longer. During extreme heat, filters should be checked weekly and replaced as soon as airflow feels restricted. This simple step improves cooling performance and reduces energy waste - a core part of commercial HVAC maintenance.
2. Clean and Clear Condenser Coils
Outdoor condenser units collect dust, cottonwood, pollen, and debris, especially in Midwest summer months. Dirty coils reduce heat transfer and force the system to work harder. A quick coil cleaning or inspection can dramatically improve efficiency and prevent mid‑season breakdowns. This is one of the most important HVAC heatwave preparation steps.
3. Verify Thermostat Settings
Small thermostat adjustments make a big difference in energy consumption and system strain.
Recommended settings:
- Occupied spaces: 74–76°F
- Unoccupied spaces: 78–80°F
Avoid drastic temperature drops. Lowering the thermostat doesn’t cool the building faster — it only increases system strain and can shorten the lifespan of your commercial cooling system.
4. Check Refrigerant Levels
Low refrigerant is one of the most common causes of poor cooling during a heatwave. It forces the compressor to work harder and can lead to system failure. A technician can quickly verify levels and check for leaks before the heat causes bigger issues. This is a critical part of preventive HVAC service.
5. Maintain Clear Airflow Around Outdoor Units
Blocked airflow can cause immediate performance problems. Ensure there is 2–3 feet of clearance around all sides of outdoor units. Remove landscaping, trash bins, storage items, or overgrown vegetation that may restrict airflow. Proper airflow is essential for commercial AC efficiency during extreme temperatures.
6. Inspect Belts, Motors, and Electrical Components
High temperatures increase wear on moving parts and electrical connections. A mid‑season inspection can catch issues early and prevent emergency calls during peak heat. This is one of the most overlooked commercial HVAC heatwave tips, but it can prevent major failures.
7. Reduce Internal Heat Load
Help your HVAC system by lowering the heat generated inside the building.
Simple steps include:
- Closing blinds on sun‑facing windows
- Turning off unused lights
- Reducing use of heat‑producing equipment
- Keeping exterior doors closed
These small changes reduce strain and improve comfort, especially in large commercial spaces.
8. Review Building Automation System (BAS) Schedules
Heatwaves often require temporary schedule adjustments. Make sure occupied and unoccupied cooling schedules are correct, sensors are calibrated, and no zones are being cooled unnecessarily. BAS optimization is one of the fastest ways to improve commercial HVAC performance during extreme heat.
9. Monitor Indoor Humidity
High humidity makes cooling harder and increases discomfort. Aim to keep indoor humidity between 40–60%. If humidity rises, the system may need dehumidification support or refrigerant evaluation. Balanced humidity is essential for commercial indoor air quality.
10. Schedule Preventive Maintenance
Heatwaves expose weaknesses quickly. A preventive maintenance visit can help avoid:
- Compressor failure
- Coil freeze‑ups
- Short cycling
- System shutdowns
- Emergency service calls
A quick tune‑up now can save thousands later and ensure your building stays comfortable through the hottest days of the year.
Stay Ahead of the Heatwave With Jarvis Mechanical
If your building is feeling the strain or you want to make sure your HVAC system is ready for extreme temperatures, our team is here to help. We’ll inspect your system, optimize performance, and make sure you’re protected through the heatwave.
Connect with our Ohio Commercial HVAC Team here: https://www.jarvismechanicalco.com/contact
