 that varies the amount of ventilation
outside air delivered to a space based on input from a single
carbon dioxide (CO2) sensor or group of sensors, which is
representative of the quantity of occupants within the space. This
strategy provides an accurate and appropriate amount of outside air
to the space based on actual occupant density, as opposed to a
constant outside air amount based on the design occupancy of the
space.
Concerns about rising energy costs and a growing interest in
Leadership in Energy and Environmental Design (LEED®) Green
Building Rating Systems™ are making DCV an increasingly popular
control strategy in new building construction and existing building
retrofits. When properly applied, DCV lowers utility bills by
reducing the amount of outside air that must be heated, cooled or
dehumidified. When applied incorrectly, it can create negative
building pressures, undesirable infiltration, and poor indoor air
quality.
This design brief provides an overview of ventilation requirements
for various codes and standards, an introduction into the design
and application of DCV, a discussion on commissioning, energy
modeling issues, and estimated energy savings from implementing DCV
strategies. Additionally, this brief also provides information on
various CO2 sensor types.
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