ENERGY/PERFORMANCE
How Rooflight U-Values Are Measured
All parts of buildings release heat to the surrounding environment, with some building materials insulating better than others. Fortunately, we can calculate the amount of energy passing through different materials and compare their insulative capabilities. These calculations help us to design the most energy-efficient skylights possible.
The calculations provide what is called a U-value, which measures how much energy (in Watts) is lost to the surroundings in relation to the product’s surface area and the temperature difference between outside and inside.
The U-value on a skylight is affected by a variety of influences – e.g. the size of the total surface area - and the heat lost at every join on the construction. Each time a new material is used, a calculation must be made for that specific material.
The calculations provide what is called a U-value, which measures how much energy (in Watts) is lost to the surroundings in relation to the product’s surface area and the temperature difference between outside and inside.
The U-value on a skylight is affected by a variety of influences – e.g. the size of the total surface area - and the heat lost at every join on the construction. Each time a new material is used, a calculation must be made for that specific material.
Documenting Our Low Rooflight U-Values For Your Project
Together, these calculations enable manufacturers to state the total and correct U-value for the specific construction.
Primalux are happy to supply fully documented calculations for your specific project, thereby showing you the potential energy savings.
CE standards state that manufacturers must be able to specify the U-value on any given finished product in your project, in order for you to calculate your exact heat loss and the overall heat loss for the building.
For more details on Primalux and on specific Primalux
products, please contact our sales office:
Phone: +45 5484 3400
E-mail: post@primalux.dk
Together, these calculations enable manufacturers to state the total and correct U-value for the specific construction.
Primalux are happy to supply fully documented calculations for your specific project, thereby showing you the potential energy savings.
CE standards state that manufacturers must be able to specify the U-value on any given finished product in your project, in order for you to calculate your exact heat loss and the overall heat loss for the building.
For more details on Primalux and on specific Primalux
products, please contact our sales office:
Phone: +45 5484 3400
E-mail: post@primalux.dk
Example of where heat loss must be calculated on an acrylic dome skylight
Example of where heat loss must be calculated on a
glass skylight
glass skylight
Thermal cross section: Less heat
loss indicated by the red colour
loss indicated by the red colour
