uPVC and Aluminium windows offer different levels of energy efficiency

uPVC profile has a U value (W/m²K) of around 1.3 to 1.8 square meter Kelvin., whereas Thermally Broken Aluminium, which we are offering as a U value of around 1.8 to 2.4, which is similar to the uPVC windows, says Mario Schmidt, Managing Director, Lingel Windows and Doors Technologies Private Limited.

What are some properties which make Lingel uPVC Windows energy efficient?
When we talk about energy efficiency, we have to mention uPVC profiles or Thermally Broken Aluminium. We are offering both of these. uPVC profile has a U value (W/m²K) of around 1.3 to 1.8 square meter Kelvin. On the other hand, NON Thermally Broken Aluminium will have a lot of energy loss because it has a U value of almost six to seven which is three to four times higher. Thermally Broken Aluminium, which we are offering as a U value of around 1.8 to 2.4, which is similar to the uPVC windows but not as good as the uPVC window. Glazing systems  and the correct installation play an important role in uPVC as well as Aluminium windows. In case the window is situated at an opening wherever we can create natural shading and the sunlight can’t directly hit glasses, we can use a much lower glass specification. But if the window is facing four to five hours of sunlight directly hitting the glazing system, a performance glazing  stopping the heat from going through would be required.

Lingel has a vast product portfolio, considering the customised requirements of specific brands, what is the level of customization that can be achieved using uPVC windows?
All windows are tailor-made and fit to measure. Each window has a specific size for a particular opening. In case the opening has a wrong measurement taken then the windows go to waste. For example, in terms of sliding, we have to take care of the wind load as well as of the load pairing. In casement doors, we don’t have to take care of the load pairing of the hinges. We have to majorly take care of the wind load and the weight load capacity of the hardware. Another factor being, selecting the right glass which comes under the same umbrella as the wind load calculation as well. Otherwise, there’s no limitation amongst all the products be it uPVC aluminium or even timber.

The year 2020 ended on a sombre note, what are your expectations from 2021 and what projects are you working on currently?
We are hoping like everybody else around the world that India doesn’t get a second wave of coronavirus. We are quite happy to be present at ACETECH after almost a year. I am hopeful about Lingel’s business prospects moving in the right direction as inquiries are coming in, buildings are getting made then construction which was stopped due to Covid-19 has revamped again as everything looks positive. The vaccination drive around the country should speed up and the forecast for this year should have doubled compared to two years ago.

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