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Perspective Program for Commercial New Construction

Perspective Program for Commercial New Construction. CNC Small Office RTF July 2007. Goal: A Prescriptive Program For Selected Simple Commercial New Construction. Whole-building, integrated measure approach where possible and effective Deemed or deemed-calculated savings

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Perspective Program for Commercial New Construction

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  1. Perspective Program for Commercial New Construction CNC Small Office RTF July 2007

  2. Goal: A Prescriptive Program For Selected Simple Commercial New Construction • Whole-building, integrated measure approach where possible and effective • Deemed or deemed-calculated savings • Commonality across the region • Training for designers, builders & developers

  3. Progress • CNC Strategy Group • Six meetings on regional needs & opportunities • RTF Subcommittee • Small Office Focus • Reviewed 21 measures, analyzed 8 in detail • Oregon code base, two climates Boise & Portland • Four HVAC system types considered • PSZGas, PSZHP, PVAVElec, PVAVGas • Details in: DRAFT CNC Prescriptive Concept July2007.doc

  4. Progress • Several iterations on baseline conditions • Size, fenestration, HVAC system, schedules … • Several iterations on measures • What is the measure, how to model it in EQuest • Incremental cost difficult to acquire

  5. Detailed Analysis on 8 Measures • Glass • Code to U40 SHGC40 • Code to U35 SHGC35 • Lighting Power Density • Code (1.0 W/sf) to 0.75 W/sf • HPT8 & T5HO • Occupancy sensor lighting in open office • Fan power improvement • Rooftop economizer Cx • Premium HVAC equipment (CEE Tier 2 EERs)

  6. Summary of Results to Date • Most measures look to be TRC cost-effective except: • CEE Tier 2 equipment • Fan power in the VAV systems • Rooftop CX in the PSZ systems • T5HO lighting option • Most kWh savings provided by HPT8 lighting • Windows: Second biggest electric measure & the biggest gas measure • HVAC measures provide about 1/5 of lighting & window savings

  7. Summary of Results to Date • Climate makes little difference in the kWh savings estimates • Except for windows in the HP systems • Climate makes a very modest difference in gas savings for the U35 window measure • HVAC system type has bigger impact on kWh & therm savings

  8. kWh Savings

  9. Therm Savings

  10. Cost

  11. TRC B/C Ratio by Measure

  12. Climate Impact on Windows (kWh)

  13. Climate Impact on Windows (therms)

  14. CEE Tier 2 Equipment

  15. Measures Combined to Packages • B/C ratios are between 1.0 and 2.0 for most packages • High B/C measures compensate for low • But not enough savings to cover all the low B/C ratio measures • Either CEE T2 OR T5HO lighting option • See tables in: SmallOffice-PC253-alpha.xls

  16. Issues • CEE Tier 2 HVAC Equip • Cost uncertainty & Low B/C ratio • Will costs come down? • Packages • Is baseline really code? What is standard practice? • Window U value and SHGC • LPD • Other measures • Other state baselines

  17. Recommendations • Plenty of cost-effective savings to proceed • Start program design work • Package measures into appropriate bundles • Develop specifications for measures • Analyze other state baselines • Analyze other climates • Design evaluation

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