EQ Credit 1: Outdoor Air Delivery Monitoring
1 Point
Intent
Provide capacity for ventilation system monitoring to help sustain
occupant comfort and well-being.
Requirements
Install permanent monitoring systems that provide feedback on
ventilation system performance to ensure that
ventilation systems maintain design minimum ventilation
requirements. Configure all monitoring equipment
to generate an alarm when the conditions vary by 10% or more from
setpoint, via either a building automation
system alarm to the building operator or via a visual or audible
alert to the building occupants.
FOR MECHANICALLY VENTILATED SPACES
- Monitor carbon dioxide concentrations within all densely occupied
spaces (those with a design occupant
density greater than or equal to 25 people per 1000 sq.ft.). CO2
monitoring locations shall be between 3
feet and 6 feet above the floor.
- For each mechanical ventilation system serving non-densely
occupied spaces, provide a direct outdoor airflow
measurement device capable of measuring the minimum outdoor airflow
rate with an accuracy of plus or
minus 15% of the design minimum outdoor air rate, as defined by
ASHRAE 62.1-2004.
FOR NATURALLY VENTILATED SPACES
Monitor CO2 concentrations within all naturally ventilated spaces.
CO2 monitoring shall be located within
the room between 3 feet and 6 feet above the floor. One CO2 sensor
may be used to represent multiple spaces if
the natural ventilation design uses passive stack(s) or other means
to induce airflow through those spaces equally
and simultaneously without intervention by building occupants.
Potential Technologies & Strategies
Install carbon dioxide and airflow measurement equipment and feed
the information to the HVAC system and/or
Building Automation System (BAS) to trigger corrective action, if
applicable. If such automatic controls are
not feasible with the building systems, use the measurement
equipment to trigger alarms that inform building
operators or occupants of a possible deficiency in outdoor air
delivery. |
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