Retail-NC-v2009 EAc1: Optimize energy performance 1-19 points

Credit language

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Intent

Requirements

Option 1. Whole building energy simulation (1-19 points)

• Compliance with the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4, 9.4, and 10.4) in Standard 90.1–2007 (with errata but without addenda¹) or USGBC approved equivalent.
• Inclusion of all the energy costs within and associated with the building project.
• Comparison against a baseline building that complies with Appendix G of Standard 90.1–2007 (with errata but without addenda¹) or USGBC approved equivalent. There is no default process energy cost.

• For appliances and equipment, provide cutsheets of proposed equipment and budget equipment not covered in Tables 1–4 that indicate hourly energy use. Provide a spreadsheet calculation estimating the daily use hours for each piece of equipment listed. Use the total estimated energy use in the energy simulation model as a plug load. Reduced use time (schedule change) is not a category of energy improvement in this credit. ENERGY STAR ratings and evaluations are a valid basis for performing this calculation.
• Spreadsheet calculation may also be utilized for calculation of commercial appliances energy consumption, and input into the Energy Cost Budget (ECB), in lieu of energy simulation modeling as a plug load.
• For display lighting, the space-by-space method of determining allowed lighting power under ANSI/ASHRAE/IESNA Standard 90.1–2007 must be used to determine the appropriate baseline for both the general building space and the display lighting. Installed lighting in the proposed building, including display lighting, is compared with this baseline in the simulation.
• For hard-wired refrigeration loads, the impact of energy performance improvements must be modeled with a simulation program specifically designed to account for refrigeration equipment. For example, eQUEST has a refrigeration module that can be used to simulate performance improvements in refrigeration equipment.

OR

Option 2. Prescriptive compliance path: ASHRAE Advanced Energy Design Guide (1 point)

• Less than 20,000 square feet (1,800 square meters).
• Retail occupancy.

AND

OR

Option 3. Prescriptive compliance path: Advanced Buildings™ Core Performance™ Guide (1-3 points)

• Less than 100,000 square feet (9,300 square meters).
• Comply with Section 1, Design Process Strategies, and Section 2, Core Performance Requirements.
• Health care, warehouse, or laboratory projects are ineligible for this path.

• 1 point is available for all office, school, public assembly, and retail projects less than 100,000 square feet (9,300 square meters) that comply with Sections 1 and 2 of the Core Performance Guide.
• Up to 2 additional points are available to projects that implement performance strategies listed in Section 3, Enhanced Performance. For every 3 strategies implemented from this section, 1 point is available.
• The following strategies are addressed by other aspects of LEED and are not eligible for additional points under EA Credit 1:
• 3.1—Cool Roofs
• 3.8—Night Venting
• 3.13—Additional Commissioning
Projects outside the U.S. may use ASHRAE/ASHRAE/IESNA Standard 90.1-2007 Appendices B and D to determine the appropriate climate zone.

AND

Projects must comply with the prescriptive measures in Tables 1–4 for 90% of total energy consumption for all process equipment.

Table 1. Commercial Kitchen Appliance Prescriptive Measures and Baseline for Energy Cost Budget

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Table 2. Supermarket Refrigeration Prescriptive Measures and Baseline for Energy Cost Budget

Item	Attribute	Prescriptive Measures	Baseline
Evaporator	Evaporator fan speed control	Variable speed evaporator fan	Constant volume, constant operation
	Evaporator design approach temperature	10°F (-12.2°C)	10°F (-12.2°C)
Condenser	Air cooled condenser fan speed control	Variable Speed Condenser Fan (electronically commutated motors if single phase and less than 1 hp)	Cycling one speed fan
	Air cooled condenser design approach	Floating head pressure, min of 70°F (21.1°C), 5°F (-15°C) drybulb offset	10°F to 15°F (-12.2°C to -9.4°C) depending on suction temperature
	Air cooled condenser fan power	80 Btu/Watt-hr at 10°F (-12.2°C) approach temperature	53 Btu/Watt-hr at 10°F (-12.2°C) approach temperature
	Evaporative condenser fan speed control	Variable speed condenser fan (electronically commutated motors if single phase and less than 1 hp)	Cycling one speed fan
	Evaporative condenser design approach temperature	Floating head pressure, min of 70°F (21.1°C), 9°F (-12.8°C) wetbulb offset	18°F to 25°F (-7.8°C to -3.9°C) based on design wetbulb temperature
	Evaporative condenser fan and pump power	400 Btu/Watt-hr at 100°F (37.8°C) saturated condensing temperature and 70°F (21.1°C) wetbulb temperature	330 Btu/Watt-hr at 100°F (37.8°C) saturated condensing temperature and 70°F (21.1°C) wetbulb temperature
Refrigeration System	Suction pressure control	Not addressed	Not addressed
	Condensing temperature control	85°F (29.4°C) minimum condensing temperature, fixed setpoint	85°F (29.4°C) minimum condensing temperature, fixed setpoint
	Defrost control	No electrical defrost. Hot gas defrost only	Not addressed
Compressor	Compressor capacity modulation	Variable speed drive trim compressor	Slide valves on screw compressors, multiple compressor racks on reciprocating compressor plants

Table 3. Walk-in Coolers and Freezers Prescriptive Measures and Baseline for Energy Cost Budget

Item	Attribute	Prescriptive Measures	Baseline
Envelope	Freezer insulation	R-46	R-36
	Cooler insulation	R-36	R-20
	Automatic closer doors	Yes	No
	High efficiency low/no heat reach-in doors	40W/ft (13.12 W/mm) of door frame (low temperature) 17W/ft (5.58 W/mm) of door frame (medium temperature)	40W/ft (13.12 W/mm) of door frame (low temperature) 17W/ft (5.58 W/mm) of door frame (medium temperature)
Evaporator	Evaporator fan motor and control	Shaded pole and split phase motors are prohibited. Use PSC or EMC motors.	Constant speed fan
	Hot gas defrost	Yes, no electrical defrosting	Electric defrost
Condenser	Air cooled condenser fan motor and control	Shaded pole and split phase motors are prohibited. Use PSC or EMC motors. Add condenser fan controllers	Cycling one speed fan
	Air cooled condenser design approach	Floating head pressure controls or ambient sub-cooling	10°F to 15°F (-12.2°C to -9.4°C) dependent on suction temperature
Lighting	Lighting power density (W/sq.ft.) (W/m2)	0.6 W/sq.ft. (6.46 W/m2)	0.6 W/sq.ft. (6.46 W/m2)

Chart based on Final Report on Refrigerated Warehouses PG&E (Pacific Gas & Electric) Codes and standards enhancement initiative, February 2007; Analysis of Standards Options for Walk-In Coolers (Refrigerators) and Freezers PG&E (Pacific Gas & Electric) Codes and standards enhancement initiative prepared by Davis Energy Group Energy Solutions, May 2004; and the ASHRAE Refrigeration Handbook 2004.

Strategies	Prescriptive Measures	Baseline
Make-up air strategies	Dedicated make-up air system	Transfer air through dining area
Exhaust rate control	Demand control package	Constant volume

Pilot ACPs Available

The following pilot alternative compliance path is available for this credit. See the pilot credit library for more information. EApc95: Alternative Energy Performance Metric ACP
See all forum discussions about this credit »

Frequently asked questions

What does it cost?

Cost estimates for this credit

On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.

Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.

This information is also available in a full PDF download in The Cost of LEED v4 report.

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