LI 10462 v4 Alternative for ASHRAE Receptacle controls | U.S. Green Building Council
Please upgrade your browser. This site requires a newer version to work correctly. Read more

Created on July 8, 2017

LEED Interpretation

ID# 10462

Rating System

LEED BD+C: New Construction, LEED BD+C: Core and Shell, LEED BD+C: Schools, LEED BD+C: Retail, LEED BD+C: Healthcare, LEED BD+C: Data Centers, LEED BD+C: Hospitality, LEED BD+C: Warehouses and Distribution Centers, LEED ID+C: Commercial Interiors, LEED ID+C: Retail, LEED ID+C: Hospitality

Rating System Version

v4 - LEED v4

Inquiry

ASHRAE 90.1-2010 mandatory requirement 8.4.2 Automatic Receptacle Control applies to 125 Volt receptacles in private offices, open offices, and computer classrooms. Are there any cases where exceptions to these mandatory requirements will be allowed?

Ruling

The project team is requesting clarification regarding how to model spaces where mandatory ASHRAE 90.1 receptacle controls are not implemented. Projects using one of the following two compliance paths are exempt from the receptacle control requirements:

1. Path 1: Projects Using Option 1. Whole Building Energy Simulation may model a penalty in the Proposed model for the spaces where mandatory ASHRAE 90.1 receptacle controls are not implemented. The following modeling requirements apply:
• The receptacle power density modeled for these spaces shall be the greater of 0.75 Watts per square foot (8.1 Watts per square meter) or the design coincident peak receptacle power density (if known).
• The receptacle schedule modeled in the Baseline for these spaces shall have a minimum Equivalent Full Load Hours of operation no less than:
o The ASHRAE 90.1-2010 User’s Manual default schedule for office occupancy (2,920 Equivalent Full Load Hours per year)
OR
o 120% of the occupied hours of operation for the facility
OR
o Detailed justification shall be provided supporting an alternate schedule.

• The Proposed model shall include either a 20% increase in the receptacle power density for these spaces OR a 20% increase in the scheduled receptacle Equivalent Full Load Hours of Operation versus the Baseline model.


2. Path 2: Projects must demonstrate that the project has implemented efficiency measures that will achieve an equal or greater reduction in receptacle energy consumption, and will persist for a similar timeframe to those achieved by ASHRAE 90.1-2010 Section 8.4.2. It is recommended that a Credit Interpretation Request be submitted when pursuing this approach. The project must provide documentation regarding the receptacle equipment controls that will be implemented for the project; and must provide justification supporting the claim that the savings over the life of the efficiency measure will be similar to those anticipated for a project compliant with Section 90.1-2010 Section 8.4.2. Note: The baseline and proposed receptacle energy consumption for these spaces must be modeled identically if using this approach; the project is not eligible for any further receptacle savings in these spaces using the Exceptional Calculation Method.

Applicable Credits

Name : Minimum energy performance
Rating system : New Construction,Core and Shell,Schools - New Construction,Healthcare,Hospitality - New Construction,Warehouse and distribution centers - New Construction,
Rating system version : v4

Name : Minimum energy performance
Rating system : Retail - Commercial Interiors,
Rating system version : v4

Name : Minimum energy performance
Rating system : Retail - New Construction,
Rating system version : v4

Name : Minimum energy performance
Rating system : Retail - Commercial Interiors,
Rating system version : v4

Credit Name Minimum energy performance
Credit Category Energy & atmosphere
International Applicable Internationally applicable
Campus Applicable Not campus applicable