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C403.2.6.1 Demand Controlled Ventilation

Energy Conservation Code 2015 of Colorado > 4 [CE] Commercial Energy Efficiency > C403 Building Mechanical Systems > C403.2 Provisions Applicable to All Mechanical Systems (Mandatory) > C403.2.6 Ventilation > C403.2.6.1 Demand Controlled Ventilation

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Demand control ventilation (DCV) shall be provided for spaces larger than 500 square feet (46.5 m²) and with an average occupant load of 25 people per 1,000 square feet (93 m²) of floor area (as established in Table 403.3.1.1 of the International Mechanical Code) and served by systems with one or more of the following:

An air-side economizer.
Automatic modulating control of the outdoor air damper.
A design outdoor airflow greater than 3,000 cfm (1416 L/s).

Exception: Demand control ventilation is not required for systems and spaces as follows:

Systems with energy recovery complying with Section C403.2.7.
Multiple-zone systems without direct digital control of individual zones communicating with a central control panel.
Systems with a design outdoor airflow less than 1,200 cfm (566 L/s).
Spaces where the supply airflow rate minus any makeup or outgoing transfer air requirement is less than 1,200 cfm (566 L/s).
Ventilation provided for process loads only.