Glazing Technologies

How Energy Efficient is Heated Glass?

An Overview of Heated Energy Efficient Glass

Heated glass is the product of the intersection between technology and energy efficiency, as this high specification glass type incorporates a transparent conductive coating that can be electrically charged to activate and control its heat transmission properties, ultimately reducing the need of traditional gas powered heating methods.


Advantages of Heated Energy Efficient Glass

The primary goal is of course to optimise energy usage across an entire build by dynamically adjusting the amount of heat generated within living spaces without compromises on comfort and natural light ingress. 

This is achieved through the use of conductive materials, such as indium tin oxide or transparent conductive oxides, which sit within the internal face of the exterior heated glass pane.  

When an electric current is applied, these materials generate heat, providing a controlled warming effect. Some advanced systems even use smart sensors and automation to adjust the glass properties based on external factors like ambient temperature and time of day, as the heated glass units can be integrated within smart home hubs and regular thermostats like any other system. 

Intuitively, the key advantage of heated glass is its ability to enhance energy efficiency in heating.  

During colder months, the glass can be electronically heated to prevent heat loss and reduce the overall reliance on traditional heating methods. This not only helps in maintaining a comfortable indoor environment but also contributes to energy savings and lower utility bills.


Energy Consumption and Heated Energy Efficient Glass

While heated glass offers remarkable benefits in terms of energy efficiency, it's essential to consider its own levels of energy consumption.

The process of electronically heating the glass involves the use of electric currents to activate the conductive coatings. This means that, while the glass itself contributes to reducing overall energy consumption in a building by optimizing the dwellers’ heating needs, there is still a demand for electricity during the operation of the heating feature. 

On average, heated glass consumes: 

  • 50 to 100 W/m2 for anti-condensation 
  • 100 to 250 W/m2 as an additional heating source 
  • 250 to 500 W/m2 as the main source of heating 
  • 350 to 700 W/m2 for snow removal in glass roof configurations  

These consumption levels are influenced by factors such as the size of the glass surface, the frequency of use, and the duration of heating periods. As with any technology, it becomes crucial to strike a balance between the advantages gained in energy efficiency and any potential additional energy required to power the heating elements. 

This balance can be achieved by specifying the desired configurations early on during the design phase, thus ensuring the best possible optimisation of heated glass systems within the build to meet the end user’s needs. 

Contact the IQ team today to discuss heated energy efficient glass for your next project.