Most of the energy waste we see in facilities comes from the same few places: lighting, HVAC, compressed air, and process cooling. The mistakes fall into three categories:
- System Design
- Maintenance
- Outdated Systems
1. System Design Mistakes
Lighting
Many facilities convert to LED tubes without checking the temperature rating or the light output of the tubes. The result is less light at the work surface than they had with fluorescents, plus premature LED failure.
HVAC
Poor control is the usual problem. Some areas are too hot while others are too cold, and personal heating and cooling devices make up the difference at a high operating cost.
Compressed Air
The big mistake is relying on a single-speed compressor. The energy load barely moves regardless of demand, and a variable frequency drive (VFD) can make a huge difference. Also watch for air drops feeding hoses on reels, which tend to leak.
Process Cooling
Chillers and cooling towers need to be right-sized for the actual load.
2. Maintenance Mistakes
Lighting
Dim or burned-out tubes get replaced with the same or worse, and old fluorescent ballasts stay in service.
HVAC
Filters, control dampers, and steam traps are the major culprits in wasted energy. Building management systems that are not used, or not working, add to the problem.
Compressed Air
A good leak repair program with ultrasonic leak detection is essential, along with regular filter and dryer maintenance.
Process Cooling
Leaks, dirty filters, and scale buildup all hurt efficiency.
3. Outdated Systems
Lighting
Networked lighting controls can reduce energy consumption substantially compared with simply swapping in LED tubes or fixtures. The sensors can also share occupancy information with other building systems. High-efficiency lights cut energy use, and fixtures designed for high-heat environments last longer.
HVAC
Replace fixed-speed motors with VFDs and add a building management system. Occupancy-based temperature control goes a step further: sensors and AI work out how fast each area heats up or cools down and when people arrive and leave, then adjust the temperature accordingly. This can save 15–30%.
Compressed Air
In multi-compressor setups, the primary or trim compressor should be VFD-driven. Modern compressor controls also help match output to demand.
Where to Start
If you suspect your facility is losing energy in any of these areas, start with an audit of your lighting, HVAC, compressed air, and process cooling systems. Fixing design, maintenance, and outdated equipment issues together usually delivers the biggest savings.
