Andersen now offers a glass option on all 400 Series windows and doors that provides you with the ultimate balance of high visibility and comfort. We call it SmartSun™ glass because of the way it rejects unwanted solar heat while allowing the sunlight to stream through. SmartSun glass also helps protect your furniture, carpets and drapes by blocking out 95 percent of the damaging ultraviolet rays that can cause fading and it can be instrumental in reducing energy consumption. So, now when you choose the glass for your windows and doors, your choice is more clear.
Andersen® 400 Series High-Performance™
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| Performance Characteristics based on center-of-glass values* |
Low-E4® | Low-E4® SmartSun™ | Low-E4® Sun |
| Visible light transmitted through glass | 72% | 65% | 40% |
| Ultraviolet rays blocked by glass | 84% | 95% | 84% |
| Solar heat gain coefficient (the lower the number, the less heat gets through the glass) |
.42 | .28 | .26 |
* Calculations were developed from Window 5.2a. All glass is 3mm thick, 12.7 mm gap. Energy performance ratings labeled on the product represent total unit performance as certified by the National Fenestration Rating Council (NFRC) and will differ from center-of-glass properties and by product type.
