| Performance Page 1 |
 Solid vinyl frames, fusion welded construction, chambered profile, nailing fin, tilt in sash, molded in lift rail and pull bars, double pane insulating glass, integral glazing system, constant force stainless steel balance system |
7/8" double pane insulating glass is superior to the combination of prime and storm windows.
Vinyl replacement window optional glazing:
CertainTeed vinyl replacement windows can be made with a variety of special glazing systems. CertainTeed's proprietary Thermaflect Low "E" glazing offers the best thermal performance in its class. In winter, it reflects your heat back inside to help lower heating costs. In summer, it reflects outside heat to help lower cooling costs. It blocks damaging ultra violet light, while transmitting visible light - without distorting the view.
Notes chart below:
Total vinyl replacement windows U values are tested in accordance with NFRC 100-91. Data based on double strength, double pane glass with a 5/8" air space. All values are for AA window size. Low conductance spacer used in test was Tremco's Swiggle Strip. Center of glass U values were supplied by glass manufacturers.
Daylight transmittance calculations have been performed using the Lawrence Berkeley Laboratories new and improved Window 4.0 computer program. UV block based on UV transmission from 300 to 380 nm. Shading coefficient summertime performance based on ASHRAE Standards of a solar heat gain factor of 200BTU/hr/ft2 and outdoor air temperature 14 degrees F warmer than indoor temperature.
Tests show CertainTeed vinyl replacement windows with Thermaflect glass offer industry leading thermal performance.
| Glazing Type | Total Unit U values | Glass U value (Center) | Daylight trans | UV block | Shading coef | ||||
|---|---|---|---|---|---|---|---|---|---|
| Double Hung | Glider | Picture | Case- ment | Awn- ing | |||||
| Ordinary double pane | 0.48 | 0.48 | 0.48 | 0.45 | 0.44 | 0.49 | 0.82 | 42% | 0.91 |
| Low "E" Hard coat | 0.39 | 0.39 | 0.37 | 0.37 | 0.36 | 0.35 | 0.75 | 53% | 0.84 |
| Low "E" Hard coat with Argon | 0.36 | 0.36 | 0.33 | 0.34 | 0.34 | 0.31 | 0.75 | 53% | 0.84 |
| Low "E" Hard coat with Argon and low conductance spacer | 0.35 | 0.34 | 0.32 | 0.33 | 0.32 | 0.31 | 0.75 | 53% | 0.84 |
| Thermaflect | 0.36 | 0.36 | 0.33 | 0.34 | 0.33 | 0.31 | 0.72 | 85% | 0.51 |
| Thermaflect with Argon | 0.33 | 0.36 | 0.33 | 0.34 | 0.33 | 0.31 | 0.72 | 85% | 0.51 |
| Thermaflect with Argon and low conductance spacer | 0.31 | 0.30 | 0.27 | 0.29 | 0.29 | 0.25 | 0.72 | 85% | 0.51 |
