Northwest Power and Conservation Council Small Office Savings Analysis RTF August 30, 2007

Northwest Power and Conservation Council slide 2 Summary Tested a dozen measures Tested a dozen measures Tested sensitivities to climate, building size, HVAC system type, baseline assumptions Tested sensitivities to climate, building size, HVAC system type, baseline assumptions Findings: Findings: –HVAC system type & baseline conditions impact savings estimates –Climate & building size not big factors –Package savings show modest range due to compensating effects of package

Northwest Power and Conservation Council slide 3 Electric Site Savings All Measures:

Northwest Power and Conservation Council slide 4 Electric Savings by Measure Mean of all System Types

Northwest Power and Conservation Council slide 5 Mean Gas Savings by Measure Mean of all System Types

Northwest Power and Conservation Council slide 6 Interactive Electric Savings from LPD By System Type for Boise & Seattle

Northwest Power and Conservation Council slide 7 Interactive Electric Savings from HVAC Equip. By Location & System Type

Northwest Power and Conservation Council slide 8 Windows: Savings are Sensitive to the following: Baseline assumptions for U & SHGC Baseline assumptions for U & SHGC Measure U value & SHGC interact Measure U value & SHGC interact System Type System Type Window area, window / wall ratio Window area, window / wall ratio Climate Climate Other measures in package Other measures in package

Northwest Power and Conservation Council slide 9 Window Baseline Assumptions

Northwest Power and Conservation Council slide 10 Interactive Elec. Savings from Windows Baseline to U40/SHCG40 By System & Location

Northwest Power and Conservation Council slide 11 Interactive Elec. Savings from Windows Baseline to U35/SHCG30 By System & Location Window U35/SHGC30

Northwest Power and Conservation Council slide 12 Interactive Elec. Savings from Windows Compare U35/SHCG30 to U40/SHGC40 35/30

Northwest Power and Conservation Council slide 13 35/30 Interactive Gas Savings from Windows Compare U35/SHCG30 to U40/SHGC40

Northwest Power and Conservation Council slide 14 Cooling & Ventilation Savings from Windows in Gas-Heated 35/30

Northwest Power and Conservation Council slide 15 Electric Savings from Economizer Commissioning

Northwest Power and Conservation Council slide 16 Measure Cost Estimates

Northwest Power and Conservation Council slide 17 Measure Cost per Unit Windows: $3.67 / sf glass, 30% window wall ratio Windows: $3.67 / sf glass, 30% window wall ratio LPD: $37 / fixture, for 300 fixtures LPD: $37 / fixture, for 300 fixtures Lighting Controls: $312 / sensor, for 50% open office Lighting Controls: $312 / sensor, for 50% open office CEE Tier 2: $155 / ton small, $120/ton large CEE Tier 2: $155 / ton small, $120/ton large Fan Power: $50 / ton Fan Power: $50 / ton Economizer Cx: $250/unit * 10 units for small, $500 large Economizer Cx: $250/unit * 10 units for small, $500 large Cool Cap Redux:$-1000/ton (this is a cost reduction) Cool Cap Redux:$-1000/ton (this is a cost reduction) Wall Insulation: $3.85 / sf floor Wall Insulation: $3.85 / sf floor Roof Insulation: $.64 / sf floor Roof Insulation: $.64 / sf floor

Northwest Power and Conservation Council slide 18 Measure TRC Cost-Effectiveness Seattle

Northwest Power and Conservation Council slide 19 Measure TRC Cost-Effectiveness Boise

Northwest Power and Conservation Council slide 20 Package TRC Cost-Effectiveness

Northwest Power and Conservation Council slide 21 Electric Bus Bar Savings All Measures:

Northwest Power and Conservation Council slide 22 Weighted Savings & B/C TRC B/C Ratio 1.2 TRC B/C Ratio 1.2 Savings: 2.0 kWh/sf site and 2.1 kWh/sf at bus bar Savings: 2.0 kWh/sf site and 2.1 kWh/sf at bus bar Weighting Factors: Weighting Factors: –Commercial Valuation from FW Dodge –HVAC System type & heat fuel for < 100ksf from CBSA & NEEA –Code jurisdiction for window baseline & savings

Northwest Power and Conservation Council The End