Energy Cost Budget Highlights Jason Glazer, PE GARD Analytics Arlington Heights, Illinois Energy Cost Budget Highlights6/29/2010

Overview Section 11 – Energy Cost Budget Method Appendix G – Performance Rating Method Addenda that will be included – R, W, AI, BJ, BO, BV Addenda that may be included (in process) – CH, CR, CW, DA, DB, DH, DN Why these changes?

Why These Changes? Consistency with other Addenda Continuous Maintenance Proposals Proposals from Subcommittee Members Brainstorming Session from Boston Greenbuild

Add. R – Normative Appendix G 3 Public Reviews – Will be in Replaced “should” and “may” with “shall” More specific – G1.4 – Documentation Requirements – G2.5 - Exceptional Calculation Method Table G3.1 Part 4 – Schedules – Exception for automatic control only Table G3.1 Part 14 – Exterior Conditions – Shading, ground temperatures, water main temperatures

Add. W – Two Changes Will be in Table G3.1.1A Baseline HVAC System Types – Adds to footnote to make clear that Exception (a) to Section G3.1.1 applies (additional systems for non-predominant building areas) G Exhaust Air Energy Recovery – Adds exception for systems serving dwelling units in multifamily buildings.

Add AI – Purchased Heat/Cool Will be in Adds new section on how to deal with buildings with purchased hot or chilled water Now compared to baseline with same kind of equipment and uses actual rates for purchased chilled water or hot water/steam System mapping and pump power is revised to be consistent

Add. BJ – Ventilation Effectiveness Will be in Adds exception to G Ventilation Credit for the increased ventilation effectiveness Need to use Standard 62.1 Section 6.2 Ventilation Rate Procedure

Add. BO – Consistent E, S, & U Will be in Revise G Exhaust Air Energy Recovery to just reference new heat recovery provisions in Section Changes HVAC Systems and G Equipment Efficiencies to use IEER instead of EER Reference cooling tower performance in Table 6.8.1G

Add. BV – Consistent Y, AJ, BK, AX Will be in Reference Sections 5-10 instead of just 10 in reference to receptacle loads in Table G3.1 Revise G System Fan Power to be consistent to changes to the motor section Better modeling of kitchen exhaust in and G3.1.1

Add CH – Consistent H & AH May be in Table a Footnote (b) and G replace 0.4 cfm/ft2 with 30% zone peak air flow New rules about laboratory exhaust

Add CR – Unmet Load Hours May be in Clarify definition of Unmet Load Hour and add definition for Temperature Control Throttling Range In Section 11, 300 hours replaces 50 hours but proposed must be less than budget In Appendix G, 300 hours replaces 50 hours

Add CW – Service Water Heating May be in Update Table Part 11 Service Water Heating Now can trade off efficiency

Add DA – Baseline Ventilation May be in G Ventilation new exception Baseline ventilation is what is required by code Extra ventilation has energy impact

Add DB – Air Flow and Fan May be in Add exception for labs in G Design Air Flow Rates to use 17F delta Add subsection to G System Fan Power to distribute fan power for supply, return, exhaust, and relief fans in the same proportion as the proposed design

Add DH - Renewables May be in Add definitions for “on-site renewable energy” and “purchased energy” Clarify and G2.4 into subsections about renewables and annual energy costs

Add DN – Heated Only Spaces May be in Adds systems 10 and 11 that are heating and ventilation systems with gas furnace or electric resistance heat Storage rooms, stairwells, vestibules, electrical/mechanical rooms, and restrooms

QUESTIONS ?

Add CG – Consistent D, X, AB, AC Probably not in Table Part 6 – Lighting Table G3.1 Part 6 – Lighting Daylighting schedule adjustment by separate program Use Table for control factors instead of Table G.3.2 Increased clarity

Add CI – Cooling Towers Probably not in Variable speed cooling tower as baseline Better handling of locations with extremely high wet bulbs Use terms consistent with sizing cooling towers

Add CJ – Computer Rooms Probably not in Small use System 3 or 4 Big use new System 9 – Single Zone VAV Water side economizer unless simulation program cannot simulate it Equipment schedules for 25%, 50%, 75%, 100% each for three months a year