Whether you are a window manufacturer, insulating glass manufacturer, architect or energy consultant: with the free online tool Caluwin, anyone who wants to determine the Uw value for different window constructions easily and accurately is on the safe side.
Caluwin also offers a simulation tool for pressure-equalised insulating glass units. This comprehensive performance package makes the tool a valuable aid for insulating glass manufacturers such as Glas Herzog. Wood, plastic or aluminium frames, double or triple glazing, with or without Georgian Bars - there are hardly any limits to the individual design of window solutions. However, these factors have a decisive influence on energy efficiency, condensation and the risk of mould formation.
The online tool Caluwinhas established itselfas a reliable supportin the national and international environment. Caluwinincludes the calculation of UW values, condensation and mould formation as well as energy efficiency assessments of windows and enables energy savings to be documented. In addition, insulating glass unit manufacturers and window manufacturers can use Caluwin to check whether the use of Swisspacer Air can achieve the required pressure equalisation to avoid damage from climate loads - and this can be done individually for specific insulating glass units and for given boundary conditions such as climate zones and differences in height during transport.
The manufacturer Glas Herzog GmbH is one of the leading suppliers of insulating glass units. The company, based in Waghäusl, Baden-Württemberg, supplies high-quality solutions for windows, doors and façades and primarily relies on Swisspacer spacer bars.
We attach great importance to high quality, innovation, sustainability and customer satisfaction – emphasises Managing Director Andreas Herzog junior.
To fulfil this requirement, Glas Herzog also uses Caluwintime and again: Our experience with the online tool has been really good, especially when using Swisspacer Air. We can simulate very easily and accurately how the Air affects large glasses and at different heights. This significantly minimises any unpleasant surprises. And this security is an important point for our customer satisfaction – says Andreas Herzog junior.
The insulating glass manufacturer appreciates the ease of use and the numerous functions.
Here we have all the information we need in one tool to advise our customers, show them alternatives and make reliable recommendations. Some have already been so impressed that they have created their own Caluwin account – says Herzog.
Caluwinhas also proven itself internationally: It determines various energy ratings in different countries, determines efficiency classes for passive house windows according to the guidelines of the Passive House Institute Darmstadt if required and can be operated in 17 different languages. Over the past three years, 765 individual users, mainly from Germany, Spain, Italy, Poland and France, have worked with Caluwin. However, users from other European countries, the American continents and Asia have also accessed the calculation tool.
Caluwin has a simple and intuitive user interface © Swisspacer
Caluwin is available online at www.caluwin.com and as an app for iOS and Android devices in the respective app stores.
Caluwin was developed by Swisspacer and realised by SommerInformatik GmbH with technical support from BAUWERK-IngenieurbürofürBauphysik. The Caluwin calculation core is certified by ift Rosenheim.


