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// CODE SNIPPET

6.5.3.3 Multiple-Zone VAV System Ventilation Optimization Control

Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.5 Prescriptive Path > 6.5.3 Air System Design and Control > 6.5.3.3 Multiple-Zone VAV System Ventilation Optimization Control
JUMP TO FULL CODE CHAPTER
Multiple-zone VAV systems with DDC of individual zone boxes reporting to a central control panel shall include means to automatically reduce outdoor air intake flow below design rates in response to changes in system ventilation efficiency as defined by Appendix A of ASHRAE Standard 62.1.
Exceptions to 6.5.3.3
  1. VAV systems with zonal transfer fans that recirculate air from other zones without directly mixing it with outdoor air, dual-duct dual-fan VAV systems, and VAV systems with fan-powered terminal units.
  2. Systems where total design exhaust airflow is more than 70% of total design outdoor air intake flow requirements.

Related Code Sections


C403.6.6 [CE] Commercial Energy Efficiency, Multiple-Zone VAV System Ventilation Optimization Control
Multiple-zone VAV systems with direct digital control of individual zone boxes reporting to a central control panel shall have automatic controls ...
2018 Illinois Energy Conservation Code Standards for Privately Funded Commercial Facilities and Standards for Residential Buildings > 4 [CE] Commercial Energy Efficiency > C403 Building Mechanical Systems > C403.6 Requirements for Mechanical Systems Serving Multiple Zones > C403.6.6 Multiple-Zone VAV System Ventilation Optimization Control
6.5.3.3 Heating, Ventilating, and Air Conditioning, Multiple-Zone VAV System Ventilation Optimization Control
Multiple-zone VAV systems with DDC of individual zone boxes reporting to a central control panel shall include means to automatically reduce ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.5 Prescriptive Path > 6.5.3 Air System Design and Control > 6.5.3.3 Multiple-Zone VAV System Ventilation Optimization Control
6.5.3 Heating, Ventilating, and Air Conditioning, Air System Design and Control
Multiple-zone VAV systems with DDC of individual zone boxes reporting to a central control panel shall include means to automatically ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.5 Prescriptive Path > 6.5.3 Air System Design and Control
6.5.3.2 Heating, Ventilating, and Air Conditioning, Fan Control
For multiple-zone VAV systems having a total fan system motor nameplate horsepower ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.5 Prescriptive Path > 6.5.3 Air System Design and Control > 6.5.3.2 Fan Control
6.5.1.4 Heating, Ventilating, and Air Conditioning, Economizer Heating System Impact
normal operation. Exception to 6.5.1.4 Economizers on VAV systems that cause zone-level heating to increase due to a reduction in supply air ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Illinois > 6 Heating, Ventilating, and Air Conditioning > 6.5 Prescriptive Path > 6.5.1 Economizers > 6.5.1.4 Economizer Heating System Impact
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