Greater understanding.

Even older, unsophisticated HVAC systems can be efficient if proper attention is given. This was true with our clients at a class-A office building...

This particular building is a well-maintained building that performs remarkably well considering its relatively unsophisticated HVAC system. In addition to paying close attention to proper maintenance, the building owner invested in a new DDC controls system approximately 10 years prior to our investigation and then followed through by carefully tuning those controls to eke out more performance than it seemed possible to achieve. As a result, the building maintains an Energy Star rating of 87!

BPT's careful survey of the facility included measurement of major HVAC equipment performance. That information was then incorporated into an energy model with the actual weather patterns for the most recent 12 months and "tuned" to match the actual energy bills, resulting in an excellent correlation between predicted and actual energy use (shown below). This calibrated energy model provided much greater confidence for savings projections.

The commercial building energy audit performed for this facility revealed only one, small low cost improvement opportunity. However, several capital improvement oportunities became apparent and these were promising for further reduction of energy use noticeably, perhaps an additional 10%.


  • Predicted vs Actual
  • Piping Schematic
  • Steam Boilers
  • Applied Art
  • Cooling Tower
  • Holding tank
  • Sand Filter

Benefits 01

Case Study: 800,000 sq.ft. Midwest facility for major engine manufacturer
This manufacturer was dealing with an aging steam heating system which required frequent repairs and was very costly to operate and maintain. In addition, the maintenance staff had no timely way of knowing when a problem had occurred, causing delays in repair response and impairment of production. Using a BPT team member's recommendations, existing steam equipment was converted to high-efficiency natural-gas heating coupled with easy-to-use digital controls. The new controls enabled instantaneous communication concerning the system's operation and reported on any problem with 17 different pieces of equipment. After this highly successful first phase, a second phase was implemented to gain additional savings.