PremiSlide Perfection For School Ventilation

School with new windows installed

German firm Kaspari recently completed a school renovation which helped make best use of space and improved ventilation to minimise the transmission of viruses under German law.

Kaspari, a Kömmerling partner, installed 105 PremiSlide sliding windows in the classrooms of the Middle School Vulkaneifel in the Ulmen community, Eifel region. The opening sashes slide horizontally so don’t intrude into the limited space inside the classrooms. A further 70 tilt and turn windows were installed into other rooms where space and access was less of a critical issue.



The company also dismantled the old aluminium windows, separated the materials according to type and recycled them.


 “I was enthusiastic about the choice because it is the best alternative to the conventional tilt and turn windows. PremiSlide offers much more space for modern interior design concepts, as opening the windows does not impede the space in any way.”

– Holger Kaspari 

Managing Director, Kaspari



The school's facility manager Manfred Diewald says: “Firstly, with this project we were able to implement the ventilation requirements of the government for the cold season, namely, to ventilate every 20 minutes for 5 minutes and thus minimise the transmission of corona viruses. Second, ventilation improves the indoor climate, which has a positive effect on learning behaviour.

“Thirdly, we protect the climate through highly efficient thermal insulation, reduced CO2 emissions and by significantly minimising our heating costs. And fourthly, the new windows ensure significantly better sound insulation. Thanks to the sliding windows, we can now use the entire classroom with maximum gaps between desks.”



The planning office responsible for the modernisation project was IBS Ingenieure and the responsible engineer was Christoph Braun. Braun says: “We were very satisfied with the choice of the Kömmerling PremiSlide 76 sliding system. With this property we achieved a U-value of around 0.84 W/m²K with triple glazing.”



The Kömmerling PremiSlide 76 sliding system has a total installation depth of 158 mm and the depth of the sliding sash is 76 mm. The PVC-U profile consists of a five-chamber construction with slim sight lines which ensures the greatest possible incidence of light and increased solar energy gains. The system is also made from sustainable PVC-U with lead-free stabilisers and a high percentage of recycled material.

Leigh Cooper, Commercial Sales Manager of Profine UK says: “This is an excellent international case study as to what can be achieved with Kömmerling systems. It addressed a number of scheme criteria and also helped satisfied the ventilation requirements to minimise the transmission of viruses under German law.”

Picture: PremiSlide Perfection has been used to refurbish a school in Germany.


Article written by Cathryn Ellis
10th January 2021


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