DESCRIPCION DE ACABADOS

SUMMARY RESPONSE TO

PEER REVIEW REMARKS AND RECOMMENDATIONS RECEIVED ON

TECHNICAL REVIEW DRAFT OF

50% ADVANCED ENERGY DESIGN GUIDE FOR K-12 SCHOOL BUILDINGS

April 25, 2011

On February 21, the Project Committee for the 50% Advanced Energy Design Guide for K-12 School Buildings (AEDG-K12) issued a Technical Review Draft of the document Advanced Energy Design Guide for K-12 School Buildings. Following the review period of February 21 through March 4, 2011, the AEDG-K12 Project Committee met on March 13-14 to review the remarks and recommendations received.

The committee received over 300 remarks and review recommendations from 17 reviewers representing AIA, IES, USGBC and the ASHRAE membership at large. The following

documents the Project Committee’s summary response to those remarks and recommendations. Although many of the suggestions dealt with details presented in the draft, this summary

includes responses only to significant technical recommendations, especially those in which there was disagreement with what had been written or omitted. The specific and detailed suggestions and remarks were reviewed and digested by the Project Committee in preparing the next draft of the AEDG-K12. The review remarks received fall into the following six categories. 1. General Remarks and Recommendations

• The intent of the prescriptive recommendations in this guide is to provide a list of measures to achieve at least 50% energy savings over Standard 90.1-2004. We emphasize that the AEDG-K12 presents a way, but not the only way to achieve 50% energy savings, so not all possible strategies will be included, especially specialty items. A balanced, multi-option approach is recommended.

• Energy use is considered the independent variable with cost effectiveness (i.e. simple payback or life cycle costing) as a dependent (or resulting) variable. While some of the products or recommendations may be considered premium; all recommended equipment, systems, and technology specified in the document are commercially available from multiple manufacturers.

• Per the direction of the AEDG Steering Committee, the 50% goal is based on site energy use and uses Standard 90.1-2004 as the baseline measurement. This will be consistent for all the AEDG guides in the 50% series. A high level comparison to other versions of 90.1 will be included, time and resources permitting.

• Criteria used in the advanced case prescriptive recommendations will be no less stringent than Standard 90.1-2010.

• The AEDGs are intended for new construction and major renovations, not retrofits and existing buildings. Other documents being developed for existing buildings would be more appropriate to discuss energy efficiency retrofits.

and references to the ASHRAE IAQ guide are needed. This information has been added in multiple locations in the AEDG-K12. The PC also notes that this guide is not intended to provide comprehensive guidance on IAQ and that other resources will be needed for that purpose.

• Language, figures, graphics and tables have been modified as needed for clarity and to more clearly reflect industry and ASHRAE standard terms.

• References have been added, corrected, updated, or eliminated as needed throughout the AEDG-K12. The placement of references is an editorial decision determined by

publications staff.

2. Foreword and Introduction (Chapter 1)

• Additional discussion will be added to the Foreword regarding the impact of IEQ issues in energy design on the learning environment.

• A new section will be added to Chapter 1 to emphasize the need to address all facets of school building design including comfort, IAQ, acoustics, and the learning environment. 3. Integrated Design Process (Chapter 2)

• Additional emphasis on the need for buy-in from the school board in order to achieve successful implementation of a building’s design will be added. Budget considerations will also be included.

• Chapter 2 will be modified to have a stronger emphasis on Integrated Design concepts rather than commissioning. Additional commissioning information will be added as an Appendix.

4. Performance Targets and Case Studies (Chapter 3)

• The climate zone map from Chapter 4 will either be referenced or repeated in Chapter 3.

• Lighting LPD levels have been adjusted. Design information on how to reach those levels will be included in the chapter 5 lighting how to tips.

5. Recommendations by Climate Zone (Chapter 4)

• Fenestration descriptions have been changed to metal and non-metal framed. 6. How-to Implement Recommendations (Chapter 5)

a) Envelope

• The project committee will develop a table of vertical fenestration descriptions that describe the physical characteristics of fenestration alternatives that meet the SHGC, VLT, and/or U-Factor recommendations in the AEDG-K12. This information is still in development and may not be available for the 90% review document.

b) Daylighting/Lighting

• A graph will be added to show the impacts of different colored window wells.

• Glazing systems that use fiber-fill solutions will be included as an option for areas where there is excessive outdoor ambient noise.

• Lighting level values will be corrected and will be adjusted so as to be consistent between the daylighting and lighting sections and to match the Chapter 4 recommendation tables

• While the Project Committee agrees that induction lighting can be more cost efficient from a total cost of ownership standpoint, it is not more energy efficient than HID therefore it is not included in the AEDG-K12.

c) Plug Loads/Kitchens

• These sections will be expanded and modified for clarity. d) HVAC and SWH

• Information on operating set points will be added to the zone temperature control discussion.

• Information on variable-speed compressors in HV1 (system description) will reworded so as not to appear to be an afterthought.

• Some information is intentionally repeated in HV5 (Chilled Water Systems) and HV7 (Condenser Water Systems) as these are two different systems.

• The information in HV13 will be merged with HV4 (DOAS).

• The discussion on air side economizers in HV14 (Economizer) will be revised to be more specific to the system types recommended in this guide.

• The text in HV15 (Demand Controlled Ventilation) will be revised to caution about sensor accuracy and calibration and to discuss centralized vs. distributed sensing. While set point limit information in HV15 is used in the context of carbon dioxide-based DCV, the text will also be modified to “address IAQ” rather than to “maintain acceptable IAQ.”

• A discussion on the temperature reset strategy for heating dominated climates will be added to HV16 (System Level Control Strategies).

• Filter specifications are covered in HV23 (Filters) and reference to HV23 will be added to HV1, HV2, and HV3 (system descriptions).

• HV23 (Filters) will be rewritten to address air-cleaning in general and will make reference to the requirements of ASHRAE 62.1 and the recommendations in the

ASHRAE IAQ Guide. The text will match ASHRAE 62.1 and NAFA recommendations

• While specific recommendations regarding acoustics are beyond the scope of this guide, HV27 (Noise Control) will be rewritten based on recommendations from the Acoustical Society of America to include cautionary language on noise.

• The intent of the schematics in Figure 5-23 (DOAS Configurations) is to depict airflow paths rather than to show all components of the equipment. The figure will be modified to just show the fans.

• The discussion on Thermal Energy Storage was inadvertently left out of the draft and will be re-included.

• The discussion on heat pump water heaters will be removed as these are not being recommended in this guide.

e) Quality Assurance & Commissioning

• Additional how-to tips on operation and training issues will be added. f) Additional Bonus Savings