IQ Radiant Glass® glazing option for operable vents by Jansen VISS or Schüco AWS 102. (updated July 2024)
Enhancing Energy Efficiency with Electrically Heated and Electrified Glass
HVAC systems, including heating, ventilation, and air conditioning, usually account for over 33% of total energy consumption in tall office buildings. More than half of this energy is used to counter the heat gains from occupants, lighting, and electronics. To prioritize sustainability, enhancing energy efficiency is crucial. One effective method is adopting hybrid HVAC systems that incorporate natural ventilation. However, natural ventilation may not be suitable in colder climates, making IQ Radiant Electrically Heated Glass a practical solution.
Efficient energy management in buildings can be achieved through building automation and smart systems. A crucial aspect of this is the integrated control and coordination of a building’s heating and ventilation, including natural ventilation. The HVAC system must be designed to support this feature. Electrified glass vents can complement natural ventilation to enhance thermal comfort and optimize air quality.
Targeted Thermal Comfort
Our primary goal is to enhance occupant comfort by energizing operable vents in our building systems. Fixed openings can also benefit from heating glass glazing. The combination of fresh air and radiant heat improves indoor air quality and human comfort. The IQ Radiant Electrically Heated Glass system provides unique capabilities for targeted thermal comfort without overheating or dehydrating the air.
Zonal Heating Capabilities
IQ Radiant Electrically Heated Glass can generate zonal heat, with individual glass pieces controlled by the building’s smart control system. It operates only when required, providing thermal comfort to occupants and warming other surfaces within the specific area where the active radiant heating glass is installed. During winter, operable vents can be opened for natural ventilation without compromising thermal comfort, reducing the load on heat pumps and air circulators.
Practical Applications and Energy Savings
Installing IQ Radiant Electrically Heated Glass in systems like KönigStahl/Jansen Steel VISS Parallel Vent Windows can achieve significant energy savings and improve overall thermal comfort. This approach can extend beyond operable vents to other building areas, further optimizing energy efficiency and thermal comfort.
Radiant Heating Glass Technology
Radiant heating glass technology eliminates thermal asymmetry discomfort by emitting long-wave radiation, providing thermal comfort at lower interior air temperatures. Each building and location is unique, and incorporating such systems into HVAC design can facilitate natural ventilation, enhance thermal comfort, and achieve energy savings. Our approach aims to energize operable vents while integrating technologies like electrified glass to improve building performance, occupant comfort, and sustainability.
Proven Benefits
In 2008, a study conducted at Kansas State University by the International Quality and Research Group (IQRG) compared the effectiveness of radiant glass with forced air using natural gas. The results showed numerous benefits of using radiant glass, including:
• Reduced interior air movement noise levels to zero, as radiant heat does not require fans and ductwork.
• Elimination of pollen and airborne particle transmission, as there is no air movement.
• A 44% reduction in heating demand (in BTUs) while doubling the thermal comfort area.
• No transmission loss through ductwork.
• Prevention of condensation, reducing mold risk.
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