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Hospitality takes pride of place for Hotel Krebs, which is steeped in tradition. To ensure the guest experience is as pleasant as possible, the decision was taken to provide 44 rooms with individual air-conditioning as part of a partial expansion and in cooperation with Bouygues Energies & Services.  


Tradition and history are the values that Hotel Krebs has upheld for generations. The hotelier still proves every day that the guest is king here. Responding to the wishes of the guest is not only a question of service - it is also a question of continuously adapting the hotel standards and technology to the needs of our time. Hotel management therefore decided to individually air-condition 44 rooms as part of the partial extension. The refrigeration systems department of Bouygues Energies & Services in Switzerland was commissioned with the overall management of the partial extension, as well as the planning and realisation of the air-conditioning system.

Facts & figures

Trade Refrigeration technology, heating electrics
Customer Hotel Krebs, Interlaken
Location Interlaken
Services Complete renovation of the restaurant and terrace, restoration of all rooms, installation of state-of-the-art air-conditioning with individual control in each room, adaptation and cleaning of the ventilation system,
Implementation time 4 weeks

Time is money

On the one hand, the order from Hotel Krebs included the individual air-conditioning for 44 hotel rooms, but at the same time the overall project management as well for the refrigeration, electrical and sanitation trades as well as other on-site work such as plastering and painting. The specialised areas of "fire protection" and "occupational safety" were also included by Bouygues Energies & Services. Bouygues attaches great importance to this latter area as a matter of course. The final step was a complete cleaning of the ventilation systems, which was carried out by a specialised team from Bouygues Energies & Services. It is important to keep emissions as low as possible, especially in the hotel industry. Short construction times, high efficiency in all processes and professionalism in all phases are mandatory. In the case of this partial conversion, Bouygues Energies & Services established a "fast track" schedule so that the hotel only had to remain closed for just under a month. In this short time, dismantling, assembly, testing, start-up, acceptance and handover to the customer took place. All this was only possible because Bouygues Energies & Services has a wealth of experience when it comes to the special needs of the hotel industry.

The challenges

  • The building documentation including the plans was incomplete.
  • Each hotel room was to have an individual air-conditioning control system.
  • The air-conditioning had to be separated from the monobloc, where ventilation, air-conditioning and heating converged.
  • Originally, the ventilation in the rooms could not be shut off individually, which was now desired.
  • The ventilation was also very dirty and had to be cleaned professionally.

The implementation

Due to the incomplete building documentation, there were many uncertainties before the project started. Because of this, 2 weeks before the assembly work started, a kick-off meeting was held with all trades in order to prepare everyone involved optimally.


At the beginning, the painter opened the ceilings piece by piece so that work could begin on dismantling the old ventilation system. This was a prerequisite for the smooth installation of the new units. After the new system was installed, the plasterer laid the new ceiling grid and sealed the ceilings. There was a time frame of just 2 weeks for the installation of the new system.


Bouygues Energies & Services encountered new challenges almost every day, which had to be solved "on the spot" in collaboration with the hotel director and the construction site manager, so that work could continue without delay. In order to cope with the additional workload within this tight time frame, more personnel had to be made available at short notice, which was only possible thanks to flexible planning. The fixed deadline was the set opening date of the hotel. As a result, it was imperative that all trades completed their work on time. This required demanding overall coordination and permanent presence of the Bouygues Energies & Services project manager on site.

We were very impressed with how professionally and efficiently this partial renovation could be realised. We are already noticing how much our guests appreciate the optimal climate in their hotel rooms thanks to the air-conditioning, and we have been able to massively increase customer satisfaction.

Peter Mattler, Hotel Director

At a glance

  • Complete renovation of restaurant, terrace
  • Restoration of all rooms
  • Installation of state-of-the-art air-conditioning system with individual control in each room
  • Modification of the ventilation system
  • Cleaning the overall ventilation system
  • Overall renovation project management
  • Renovation time: 4 weeks
The project was enormously complex because it was a renovation, and we never knew exactly what was coming. It was helpful that we have a lot of experience and know-how in the hotel and catering industry. Teamwork, both internally and externally, was very much in demand. This enabled us to achieve our goal of limiting vacancies to just a few weeks.

Dejan Tomic, Project Manager Bouygues Energies & Services

Contact us!

Bouygues E&S InTec Switzerland Ltd.
SPOC hotelleriesuisse
Tel. +41 44 905 58 02


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