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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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goal a prescriptive program for selected simple commercial new construction
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
progress
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
progress1
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
detailed analysis on 8 measures
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)
summary of results to date
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
summary of results to date1
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
measures combined to packages
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
issues
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
recommendations
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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