
Independent engineering consultancy for HVAC and energy planning (CVS) for industry and the tertiary sector in Western Switzerland

Sydeen & Associés
Porrentruy · Neuchâtel · NyonNew on Amplifa
About Sydeen & Associés
Sydeen & Associés is an independent engineering consultancy specialising in building services (Chauffage, Ventilation, Climatisation, Sanitaire – CVS) and energy technology. The firm plans and optimises heating, ventilation, air-conditioning and sanitary systems for industrial production environments and tertiary buildings, from feasibility studies through detailed dimensioning to site supervision. Services include energy audits with savings potentials of 20 to 40 %, thermal and building-physics calculations, acoustic investigations, refrigerant balances in accordance with ORRChim as well as 3D/BIM modelling including point-cloud surveys. Industry focuses are the watch industry, food, pharmaceuticals and microtechnology as well as offices, collective buildings and public buildings. With over 300 completed projects in the cantons of Neuchâtel, Jura and Bern, the firm is active across Romandie from three locations in Porrentruy, Neuchâtel and Nyon.
- Site
- Porrentruy
- Processes
- CVS engineering (design and optimisation of heating, ventilation, air-conditioning and, Complete HVAC & sanitary studies (thermal, aeraulic, hydraulic calculations and balances, Design and optimisation of networks (air, water, sanitary, cooling, vacuum), Climate management of buildings and workshops (heating, cooling, humidity, air quality), Client advisory support (needs definition, site supervision, control of deadlines and, CVS expertise and diagnostics (renovation of technical installations), Energy expertise of installations (energy audit, savings of 20 to 40%), Temperature variability analysis (zones that are too hot or too cold)
- Materials
- CVS Engineering, Energy Expertise & Diagnostics, 3D and BIM, Refrigerant Balance (ORRChim), Energy and Environment, Compliance and Regulation
- Industries
- Watch industry, Food industry, Pharmaceutical industry, Microtechnology, Industry, Tertiary sector (offices, residential buildings, public buildings)
- 01
Needs analysis and as-is survey (where applicable site visit, point clouds)
- 02
Feasibility study and preliminary design
- 03
Detailed planning: dimensioning, execution plans, specifications, tendering
- 04
Supporting supervision: coordination, quality control, acceptance and
- 05
Operational optimisation: diagnostics, energy audit, verification of results
Services and Methods
CVS Engineering
Planning and optimisation of heating, ventilation, air-conditioning and sanitary systems for industry and the tertiary sector.
Energy Expertise & Diagnostics
Energy audits and diagnostics of existing installations with savings potentials of 20 to 40 %.
3D and BIM
3D modelling of building services, conversion of 2D plans and point-cloud surveys.
Refrigerant Balance (ORRChim)
Inventory, register, leak checks and transition planning for refrigerants.
Energy and Environment
Integration of renewable energies, heat pumps and heat recovery.
Compliance and Regulation
CECB, Minergie, building physics, acoustics and building permit dossiers.
Locations

Porrentruy
CHOffice (headquarters)
- Materials
- CVS planning, energy expertise, compliance
- CVS engineering consultancy
Neuchâtel
CHOffice
- Materials
- CVS planning, energy expertise
- CVS engineering consultancy
Nyon
CHOffice
- Materials
- CVS planning, energy expertise
- CVS engineering consultancy
Projects and References


Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| CVS engineering (design and optimisation of heating, ventilation, air-conditioning andEngineering | – | – | – | – | – |
| Complete HVAC & sanitary studies (thermal, aeraulic, hydraulic calculations and balancesEngineering | – | – | – | – | – |
| Design and optimisation of networks (air, water, sanitary, cooling, vacuum)Engineering | – | – | – | – | – |
| Climate management of buildings and workshops (heating, cooling, humidity, air quality)Engineering | – | – | – | – | – |
| Client advisory support (needs definition, site supervision, control of deadlines andEngineering | – | – | – | – | – |
| CVS expertise and diagnostics (renovation of technical installations)Engineering | – | – | – | – | – |
| Energy expertise of installations (energy audit, savings of 20 to 40%)Engineering | – | – | – | – | – |
| Temperature variability analysis (zones that are too hot or too cold)Engineering | – | – | – | – | – |
| Risk analysis of technical installations (especially in electroplating: air pollution,Engineering | – | – | – | – | – |
| Refrigerant gas balance (inventory, register, leak checks, ORRChim compliance)Engineering | – | – | – | – | – |
| Energy and environment: integration of renewable energies (aerothermal, geothermal, solar,Engineering | – | – | – | – | – |
| Design of individual and industrial heat pumps / heat recovery systemsEngineering | – | – | – | – | – |
| Energy and acoustic analysis / regulatory complianceEngineering | – | – | – | – | – |
| 3D and BIM (3D modelling of technical installations, conversion of 2D plans into 3D models,Engineering | – | – | – | – | – |
| Cleanrooms and controlled environments (design)Engineering | – | – | – | – | – |
| Industrial heat recovery (design)Engineering | – | – | – | – | – |
| Ventilation, precision air conditioning, machine refrigeration (design)Engineering | – | – | – | – | – |
| Dust extraction and oil mist separation (design)Engineering | – | – | – | – | – |
| Compressed air and vacuum (network design)Engineering | – | – | – | – | – |
| Building physics (thermal calculations, envelope studies, insulation performance)Engineering | – | – | – | – | – |
| Acoustics, noise and vibrations (acoustic studies, noise measurements, attenuation solutions)Testing | – | – | – | – | – |
| CECB (cantonal building energy certificate)Engineering | – | – | – | – | – |
| Support for Minergie, Minergie-P, Minergie-A labelsEngineering | – | – | – | – | – |
| Building permits (3D modelling, technical coordination, complete dossiers)Engineering | – | – | – | – | – |
| Control systems and BMS (building management systems, programming, automatic optimisation)Engineering | – | – | – | – | – |
| Sanitary (production and distribution of domestic hot water)Engineering | – | – | – | – | – |
Additional services
Reference customers
History
- ca. 2000
Founded as an independent engineering consultancy for HVAC and energy technology (25 years of expertise)
- 2000
Start of the ongoing mandate for Louis Lang SA, Porrentruy
- 2013
Mandates for Universo SA (La Chaux-de-Fonds) and Camille Bloch SA (Courtelary)
- 2015
Start of the ongoing mandate for Comadur SA, Le Locle
- 2023
Mandates for Joray & Wyss SA (Delémont) and MRP SA (Alle), 2023–2025