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// CODE SNIPPET

403.3.1.1.2.3.2 System Ventilation Efficiency

Mechanical Code 2015 of New York State > 4 Ventilation > 403 Mechanical Ventilation > 403.3 Outdoor Air and Local Exhaust Airflow Rates > 403.3.1 Other Buildings Intended to Be Occupied > 403.3.1.1 Outdoor Airflow Rate > 403.3.1.1.2 System Outdoor Airflow > 403.3.1.1.2.3 Multiple Zone Recirculating Systems > 403.3.1.1.2.3.2 System Ventilation Efficiency
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The system ventilation efficiency (Ev) shall be determined using Table 403.3.1.1.2.3.2 or Appendix A of ASHRAE 62.1.
TABLE 403.3.1.1.2.3.2 SYSTEM VENTILATION EFFICIENCYa,b
Max (Zp) Ev
≤ 0.15 1
≤ 0.25 0.9
≤ 0.35 0.8
≤ 0.45 0.7
≤ 0.55 0.6
≤ 0.65 0.5
≤ 0.75 0.4
> 0.75 0.3

a. Max (Zp ) is the largest value of Zp calculated using Equation 4-5 among all the zones served by the system.
b. Interpolating between table values shall be permitted.

Related Code Sections


403.3.1.1.2.3.2 Ventilation, System Ventilation Efficiency
The system ventilation efficiency ( E v ) shall be determined using Table 403.3.1.1.2.3.2 or Appendix A of ASHRAE 62.1. TABLE 403.3.1.1.2.3.2 ...
2020 Mechanical Code of NYS > 4 Ventilation > 403 Mechanical Ventilation > 403.3 Outdoor Air and Local Exhaust Airflow Rates > 403.3.1 Other Buildings Intended to Be Occupied > 403.3.1.1 Outdoor Airflow Rate > 403.3.1.1.2 System Outdoor Airflow > 403.3.1.1.2.3 Multiple Zone Recirculating Systems > 403.3.1.1.2.3.2 System Ventilation Efficiency
403.3.1.1.2.3.2 Ventilation, System Ventilation Efficiency
The system ventilation efficiency ( E v ) shall be determined using Table 403.3.1.1.2.3.2 or Appendix A of ASHRAE 62.1. TABLE 403.3.1.1.2.3.2 ...
Mechanical Code 2015 of New York State > 4 Ventilation > 403 Mechanical Ventilation > 403.3 Outdoor Air and Local Exhaust Airflow Rates > 403.3.1 Other Buildings Intended to Be Occupied > 403.3.1.1 Outdoor Airflow Rate > 403.3.1.1.2 System Outdoor Airflow > 403.3.1.1.2.3 Multiple Zone Recirculating Systems > 403.3.1.1.2.3.2 System Ventilation Efficiency
C403.6.6 [CE] Commercial Energy Efficiency, Multiple-Zone VAV System Ventilation Optimization Control
configured to reduce outdoor air intake flow below design rates in response to changes in system ventilation efficiency ( E v ) as defined ...
2020 Energy Conservation Code of NYS > 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
C403.4.4.6 [CE] Commercial Energy Efficiency, Multiple-Zone VAV System Ventilation Optimization Control
configured to reduce outdoor air intake flow below design rates in response to changes in system ventilation efficiency ( E v ) as defined ...
New York State Energy Conservation Construction Code (NYSECCC) > 4 [CE] Commercial Energy Efficiency > C403 Building Mechanical Systems > C403.4 Hydronic and Multiple-Zone HVAC Systems Controls and Equipment. (Prescriptive) > C403.4.4 Requirements for Complex Mechanical Systems Serving Multiple Zones > C403.4.4.6 Multiple-Zone VAV System Ventilation Optimization Control
R403.6.1 [RE] Residential Energy Efficiency, Whole-House Mechanical Ventilation System Fan Efficacy
When installed to function as a whole house mechanical ventilation system fans shall meet the efficacy requirements of Table R403.6.1. Exception ...
New York State Energy Conservation Construction Code (NYSECCC) > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.6 Mechanical Ventilation (Mandatory) > R403.6.1 Whole-House Mechanical Ventilation System Fan Efficacy
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