High Performance Glazing: Current Triple Glazed Options David Baylon, Ecotope Inc.

1. High Performance Glazing:Current Triple Glazed OptionsDavid Baylon, Ecotope Inc.

2. Introduction • Triple glaze option developed in the early 1990s • Vinyl window frames “Super Windows” • Atrium Windows (the BestBuilt Windows plant in Yakima) introduced a triple glazed. • Triple glazed U-value” 0.16 to 0.24 (depending on window package & Low-e configuration) • Target price to general contractor (or Home Depot) $12.00/sf • Incremental cost from Class 30 window: $2.00/sf • With installation mark-up $2.00-2.50

3. Window Characteristics • Triple Glazing, Two layers of double strength, one layer of single strength • Low-e coating on one surface (5) or two (2,5) • Low-e either e=.21 or e=.04 • Large difference in SHGC small difference in U-value • Argon fill • 1.0” overall glazing section

4. Savings impact: • Two prototypes analyzed: • Weatherized retrofit, • New Construction • 2200 sf prototype for both cases • EStar NWBOP standards, • Window U=0.22, SHGC=0.23

5. Gas Savings (90+ AFUE)

6. Gas Savings

7. Heat Pump Savings

8. Electric Heat Pump

9. Retrofit Gas Savings

10. Retrofit with Base Heat Pump

11. Cost Benefit • Using $2/sf, B/C from $0.10 avoided cost: • 1.1 Portland • 3.1 Kalispell • Break even at $3.00/sf for retrofit, $2.30 for new construction

12. Conclusions • Triple glazing technolgies are Cost-effective in the current market • Performance of the range of U=0.16 available • About half the values of our current codes and specs • Typical package U-Value ~U=0.22 • SHGC can be about .40 with little loss in U-value • Lower emissivity reduces SHGC to ~.25

13. Contact Information: David Baylon, President Ecotope, Inc. 4056 9th Avenue NE Seattle, Washington 98105 PH: (206) 322-3753, FAX: (206) 325-7270 ecotope.com