projects have come in a wide variety of sizes and shapes, and
range from relatively simple to extremely complex. Yet they
all share one common characteristic: they were all performing
poorly from a comfort or energy consumption, usually both, standpoint.
Comfort issues can manifest themselves in many ways. Humidity
control issues in Data Rooms and indoor air quality issues
in Hospitals, for example, are emblematic of performance
deficiencies and can result in debilitating outages or be the
difference between life or death.
Obviously not every project has such high
stakes, but depending on your particular circumstances a deficient
HVAC system is costing you money in more ways than just operating
costs. The relationship between well-operated HVAC systems and
worker productivity is well documented and is obvious to even
the most casual observer. Achieving the exacting balance between
comfort and efficiency is a complex process and is unique to
each and every facility because every facility is unique.
The projects discussed here are representative
of the challenges that plague most if not all HVAC systems,
and include design, EMS, commissioning, installation and maintenance
deficiencies to varying degrees. The processes we have used
to achieve these dramatic end results has been constant, and
we believe are the only means by which to achieve true energy
- Detailed analysis of the HVAC system to identify all deficiencies,
develop corrective solutions, and develop optimization strategies.
Budget costs are generated and potential impacts on energy
consumption provided at this time
- The scope of work is developed, construction documents prepared
during this phase. The documents can be used to solicit bidders,
but it is advantageous to negotiate with known, qualified
contractors to ensure usually critical schedules are met
- After installation, Commissioning and Test & Balance activities
are conducted. These results provide substantial insight into
the system’s operational minutia that is used to fine-tune
the EMS during the final phase of the project
- The OptimissioningSM of the system involves developing sequences
of operations, testing, and evaluating the system’s response
under as many conditions as possible. It is an iterative and
time-consuming process we use to optimize critical setpoints,
implement reset schedules, and identify just how far we can
push the envelope. This is when the goal of maximum efficiency
with no sacrifice in comfort is achieved.
Many times this process actually adds heating or cooling
loads to the facility, as there are usually zone loads that
are not being satisfied. There are always maintenance issues
that when corrected may also add to the loads, all of which
increase energy consumption. Even so, the results are undeniable:
a correctly designed, controlled and operated HVAC system will
meet all requirements and will operate at much lower costs than
an under-performing system.
Please take the time to review these projects and imagine the
the combined backgrounds and experience, E3 provides a team
that understands the complexities of the entire HVAC system
and the Building Automated Control System that runs it."
L. Cox, TBE