Upgrade the HVAC and Lighting Controls First
You will want to ensure that the major energy-related systems are improved to
perform optimally. Prior to changing out any of the mechanical or electrical
system hardware you’ll probably need to upgrade the control systems and
the control system terminal application software. This will allow the owner
to obtain the needed information about systems, usage, and issues prior to
investing in the more expensive mechanical and electrical upgrades.
Some system issues may not be mechanical or electrical in nature but can
involve sequences of operation, changed use of spaces or undocumented sys-
tem changes. Getting the information through a new set of controls and oper-
ator software will give you insight into how to effectively and efficiently
recommission the systems.
Recommission the HVAC System
With the information obtained from the new control system and physical
inspection recommission the HVAC system. Make the hardware upgrades or
replacements as needed. Studies have shown that recommissioned systems in
commercial office space have an average payback of 9 months. In a hospital
environment where energy usage may be 2.5 times that of commercial office
space the payback can be measured in weeks.
Upgrade the Building Security, Energy-Related,
and Technology Amenities
The decision as to what other systems need to be upgraded is based on the esti-
mated financial return of the investment. That is, will it lower operating costs,
provide a basis for increasing rents or lower energy costs? The security systems
obviously need to provide adequate security but they also need to be
integrated into the lighting and HVAC control. An access control system in
particular can provide information (i.e., number of persons in an area, when
people are in an area, etc.) that can be used to adjust and manage the HVAC
and lighting systems.
To better manage energy within the building you will need to add sensor
systems (CO 2 sensors, occupancy sensors, etc.), metering for all energy and
utility systems, and a power management system if the building lacks the same.
Finally, if your building is commercial office space, examine those technology
amenities that tenants may perceive have value. The idea is to turn the “value”
into higher lease rates and tenants who rent for longer periods. These types of
systems may include digital signage, Wi-Fi throughout the building and a
distributed antenna system (DAS) to improve cell coverage.
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