Maximizing Commercial HVAC Efficiency: Maintenance Strategies for High IEER in Greensboro
SBS-NC, LLC Commercial HVAC • January 22, 2026
Maximizing HVAC Efficiency
Because IEER measures how efficiently your HVAC system performs at part-load (25%, 50%, and 75% capacity), maintaining that rating requires more than just a "quick fix." It requires a specialized preventative maintenance
strategy tailored to the Piedmont Triad’s unique climate.
Here is how you can ensure your commercial units maintain high IEER ratings and keep your Greensboro facility’s utility bills under control.
1. Calibrate Sensors for Smart Modulation
High-IEER units are "smart"—they use variable-speed technology to dial down power when the weather in Greensboro is mild (like our typical spring and fall). However, if your sensors are uncalibrated, the system won't know when to throttle back.
The Fix: Ensure your technicians calibrate temperature and pressure sensors quarterly. This allows the system to accurately detect part-load conditions and stay in its most efficient operating state.
2. Deep Coil Cleaning for the North Carolina Climate
Greensboro’s high humidity and seasonal pollen can quickly coat condenser and evaporator coils. Even a thin layer of grime forces the compressor to work harder, dragging down your IEER.
The Fix: Schedule professional coil cleaning
twice a year. Maintaining "hospital-grade" cleanliness on your coils allows for optimal heat transfer, which is essential when the unit is attempting to run at 25% or 50% capacity.
3. Precision Refrigerant Management
An overcharged or undercharged system will never hit its rated IEER. In fact, incorrect refrigerant levels are one of the most common causes of efficiency loss in commercial RTUs
(Rooftop Units).
The Fix: Use a partner that performs sub-cooling and superheat measurements during every maintenance visit. Precision charging ensures the mechanical cycle is optimized for all four IEER load points.
4. Blower Motor and VFD Maintenance
Many high-efficiency systems in Greensboro use Variable Frequency Drives (VFDs)
to control fan speeds. If these components are neglected, the energy savings promised by a high IEER rating will vanish.
The Fix: Inspect VFDs for dust buildup and ensure cooling fans on the drives are functional. Lubricating bearings and checking belt tension reduces the friction that high-efficiency motors have to overcome.
Why Greensboro Facilities Choose Self-Performing Partners
In a city with a heavy concentration of manufacturing, logistics, and corporate offices, you cannot afford to leave your HVAC efficiency to chance. Many national providers use subcontractors who may not have the specialized training to maintain high-IEER systems.
SBS-NC, LLC is a 100% self-performing
commercial HVAC company. Our own vetted, uniformed technicians handle every site in Greensboro and across our 7-state network. We understand that maintaining a high IEER rating is about the details—from sensor calibration to advanced coil care.
Get a High-Efficiency Audit for Your Portfolio
Don't let your energy ratings slip. Protect your investment and your bottom line with a maintenance plan designed for the 2026 energy landscape.
Contact SBS-NC, LLC
today to discuss a tailored preventative maintenance plan for your Greensboro operations.
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