Usage examples for local and district heating

Project
An innovative district heating project was completed for Centro Manutenzioni in San Bernardino in the canton of Grisons. The project consisted of the installation of CALPEX and CASAFLEX lines to supply the new fire brigade building with sustainable energy.

Execution
The construction work started in September 2024 and was carried out in several stages.
The CALPEX PUR-KING was laid in dimensions 75+75/202 (DN 65) and 63+63/182 (DN 50) over a length of 48 metres. These CALPEX lines are responsible for supplying the building with heat, hot water and cooling air by two heat pumps.

The CASAFLEX UNO, with a length of 86 metres and dimension DN 65, was used for the regeneration of probes that are heated by solar collectors. These probes were specially designed for the use of renewable energies. One of the greatest challenges of this project was the precise coordination of the installation work due to the demanding topography and the specific requirements of the solar collectors and heat pumps. Thanks to the close collaboration with the engineering office and the partners involved, it was possible to complete the project on schedule.

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Project
We laid 250 metres of our CALPEX PUR-KING pipe in a door-to-door connection for the new building site of the primary school in Mettmenstetten, Switzerland. Thanks to its excellent capacity for insulation, the pipe is an optimal solution for both local and district heating applications, ensuring an efficient and low-loss supply of heat.

Execution
The construction site was located on the school grounds in Mettmenstetten and included the laying of a CALPEX DUO pipe for the heat supply. The main challenge was to safely pull in the 250 metre-long pipe in one piece and with five successive bending radii without damaging it. Our new caterpillar winch proved extremely useful here. Its flexibility meant it could be moved anywhere it was needed, making it possible to pull in at the optimum angle.

We also put great emphasis on the safety of the schoolchildren and made sure that no unauthorised persons entered the danger zone. Our specialists carefully aligned the cables and saw to it that everything was optimally connected. Thanks to the high insulation performance and durability of the CALPEX PUR-KING, we were able to install an energy-efficient system that will reliably supply the future building with heat.

Despite all the conditions as well as ongoing school operations, the laying work went smoothly thanks to our experienced team.

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Project
We installed our highest-quality PEX pipe system CALPEX PUR-KING in the Swiss municipality of Lostorf for our customer, the building technology association suissetec. Together with our partner, we installed a district heating network with the best thermal insulation, which now connects the existing local heating network with the new building.

Execution
The construction site took place at the suissetec Campus, the suissetec training centre, on Grundstrasse in Lostorf. We installed a total of four pipes for the new building. We installed two pipes each for the flow and return of the district heating network in the dimension DN 100 with an inner diameter of 110 mm and an outer diameter of 202 mm.

The coordination between logistics and assembly went smoothly and without any loss of working time, despite two drums. While the first drum was being delivered and unwound, the transport lorry drove back to Kleindöttingen to pick up the second load. Meanwhile, our fitters aligned the pipes in the trench and prepared the house connections. The second drum was then delivered, the pipes unloaded, aligned in the trench, connected to the existing pipes and insulated.

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Project
In the Swiss municipality of Aeugst on Albis, we installed our highly insulated CALPEX PUR-KING pipe system for the Götschihof energy network. Together with our partner Builcon Energie AG, we installed an efficient district heating network for the future operation of the local energy systems and residential properties of the Swiss National Donation and the Solvita Foundation's residential home.

Execution
An energy network will be created at Götschihof. This will consist of a biogas plant, a combined heat and power plant, several photovoltaic systems and a wood chip heating system. We constructed the necessary district heating pipeline in rural Aeugstertal to connect these individual energy generators.

Our fitters laid four CALPEX PUR-KING pipes in the shortest possible time. The dimensions installed were DN 40, DN 50, DN 63 and DN 68. The longest section was 113 metres from the woodchip heating system to the second-largest heat distributor with photovoltaic system. Another shorter pipe was installed between the two almost completed photovoltaic systems. Our team then successfully installed four house entry bends under the floor slab in the new central building.

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Project
In the canton of Basel-Stadt, an efficient pipe was laid in the village of Riehen for the Fondation Beyeler, the internationally renowned museum of modern and contemporary art. Our best-insulated CALPEX pipe was used to supply the new museum building with district heating and cooling in the future.

Execution
Construction work began in November 2023 and extended over three stages. A total CALPEX pipe length of approx. 800 metres was installed in the project. The aim of the work was to connect the new museum building with the pavilion and connect it to an existing district heating network. A special feature of the project was the production of a special part. This was a ventilation system, which was agreed with the customer before construction work began and installed accordingly. During the construction work, the customised part had to be slightly adjusted on site by the regional welder.

One of the biggest challenges in the CALPEX project, in addition to the complex construction of the customised product, was the terrain next to the new museum building. In order to protect the large old trees, the pipes had to be laid carefully in the trench - which our fitters mastered in exemplary fashion.

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Project
In Hamilton, the new Police Services Building was connected to an existing FLEXWELL main line with two new heating lines.

Execution
Two 35-meter hot water CALPEX PUR-KING lines of DN100/4" and one 80-meter line of DN20/0.75" were installed. The work involved connecting the CALPEX PUR-KING pipes to two fabricated tees, which were then connected to the existing FLEXWELL installation, laying them in a trench under the driveway of the parking garage. Furthermore, a ¾-inch CALPEX PUR-KING pipe was connected to the supply line, which was then routed to a vault to allow for the evacuation of any air in the system.