AT-84-18-1 -- New Window Systems Improve Comfort and Reduce Energy Demand PDF

"High insulation technology" (HIT) has resulted in windows of extremely low U-values, down to 0.6 W/m2·K (0.106 Btu/h·ft2·°F) combined with a high solar (0,5) and visual (0,63) transmission. All thermal bridges existing in traditional windows have been eliminated. The main features of the new HIT-windows are presented and the test results of recent years discussed.

Theoretical simulation and practical experience of more than a year indicate a strong influence on the energy management of commercial as well as residential buildings. In addition to a high reduction of energy consumption, comfort is very much improved, yielding new perspectives for HVAC systems. First experiences with different systems in occupied full-size rooms are reported and discussed.