Product Properties
Product Properties
U-factors of ACRYLITE®
Thermal Conductivity
The U-factor, or overall heat transmission coefficient, is the amount of heat which will pass through one square foot of a specific thickness of material per hour. U factors depend on specific conditions and differ for summer and winter.
U-Factors Btu/(hour)(sq.ft.)(F)
| Vertical Installation | Horizontal Installation | |||
| Sheet Thickness | Summer Conditions |
Winter Conditions |
Summer Conditions |
Winter Conditions |
| 3.0 mm (1/8”) | 0.98 | 1.06 | 0.79 | 1.15 |
| 4.5 mm (3/16”) | 0.94 | 1.02 | 0.76 | 1.09 |
| 6.0 mm (1/4”) | 0.90 | 0.97 | 0.74 | 1.04 |
| 9.5 mm (3/8”) | 0.83 | 0.89 | 0.69 | 0.95 |
| 12.0 mm (1/2”) | 0.76 | 0.81 | 0.65 | 0.87 |
| 24.0 mm (1”) | 0.59 | 0.62 | 0.53 | 0.66 |
| 31.8 mm (1.25”) | 0.53 | 0.55 | 0.47 | 0.57 |
| 50.8 mm (2.00”) | 0.40 | 0.42 | 0.37 | 0.43 |
Total Heat Loss or Gain through a Window Due to Conduction/Convection
Heat Loss (Btu/hr) = Window Area (sq. ft.) x [Indoor Temp(°F) - Outdoor Temp(°F)] x U-Factor
For glazing applications, there are some things that should be taken into consideration when designing the framework: thermal contraction and expansion, moisture expansion and contraction, and foreshortening due to deflection under load.