Perspective Program for Commercial New Construction

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