90.1-2010 Energy Cost Budget Highlights

Jason Glazer, PEGARD Analytics

Arlington Heights, Illinois847-698-5686

jglazer@gard.com

90.1-2010 Energy Cost Budget Highlights 6/29/2010

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 90.1-2010• 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 90.1-2010• 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)

• G3.1.2.10 Exhaust Air Energy Recovery– Adds exception for systems serving dwelling units

in multifamily buildings.

Add AI – Purchased Heat/Cool

• Will be in 90.1-2010• 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 90.1-2010• Adds exception to G3.1.2.5 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 90.1-2010• Revise G3.1.2.10 Exhaust Air Energy Recovery

to just reference new heat recovery provisions in Section 6.5.6.1

• Changes 11.3.2 HVAC Systems and G3.1.2.1 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 90.1-2010• Reference Sections 5-10 instead of just 10 in

reference to receptacle loads in Table G3.1• Revise G3.1.2.9 System Fan Power to be

consistent to changes to the motor section• Better modeling of kitchen exhaust in 11.3.2

and G3.1.1

Add CH – Consistent H & AH

• May be in 90.1-2010 • Table 11.3.2a Footnote (b) and G3.1.3.13

replace 0.4 cfm/ft2 with 30% zone peak air flow

• New rules about laboratory exhaust

Add CR – Unmet Load Hours

• May be in 90.1-2010 • 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 90.1-2010 • Update Table 11.3.1 Part 11 Service Water

Heating• Now can trade off efficiency

Add DA – Baseline Ventilation

• May be in 90.1-2010 • G3.1.2.5 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 90.1-2010 • Add exception for labs in G3.1.2.8 Design Air

Flow Rates to use 17F delta • Add subsection to G3.1.2.9 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 90.1-2010• Add definitions for “on-site renewable

energy” and “purchased energy”• Clarify 11.2.3 and G2.4 into subsections about

renewables and annual energy costs

Add DN – Heated Only Spaces

• May be in 90.1-2010• 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

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