Our skills and services

Expert in cabin thermal management

With more than 35 years of expertise, SNDC's R&D teams have a structured approach that takes into account all the parameters of cabin climate control. Comfort improvement, consumption reduction, interaction with engine cooling, production cost, reliability, compliance with standard requirements, are all parameters to be taken into account in the HVAC design of standard solutions or of custom solutions. Through an approach that takes into account the parameters specific to each development, SNDC's design process is part of the optimisation of competitive and efficient solutions.

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Project definition

Project proposal:

Together, we draw up specifications corresponding to your needs, constraints and standard requirements in order to carry out a feasibility study (heat balance, simulation, modelling), the basis of a technical proposal (architecture, sizing) and commercial proposal (target cost) adapted to your needs.

Design and development

Design and development:

SNDC's R&D teams model and integrate the appropriate HVAC solution into your 3D environment, ensuring a realistic rendering and saving time. Ease and speed of assembly, accessibility during maintenance operations, constraints with other functions, all parameters taken into account according to an established process and integrated into the quality management system.

Prototypes and tests

Prototyping and testing:

SNDC has a test center that can reproduce the harshest climatic conditions. An essential phase in development, the testing of prototypes in the series configuration in the test centre allows for the development and validation of customer and standard requirements (performance, operating limitations, aging, etc.) under actual conditions of use.

Pre-production and industrialisation:

Pre-production and industrialisation

SNDC assembles all of its products at its Labarthe-sur-Lèze site. The traceability and testing of 100% of production on automated benches, the continuous improvement process, the Lean Manufacturing approach, and the stability of our teams are all guarantees of the quality of SNDC products. From the pre-production stage, SNDC's teams accompany the integration (assembly, implementation, inspection, etc.) of the solution on your assembly site.

Integration of standards

Air treatment in agricultural machinery, public works equipment and industrial vehicles is a source of comfort that is inseparable from working conditions. It is also a safety factor during phytosanitary treatment work, by protecting the operator against exposure to toxic pollutants. SNDC integrates the standard requirements specific to each environment and activity in its project process.

Thermal comfort

Control and maintenance of cabin air temperature
Homogeneity and ergonomics of air distribution

Standards: ISO 10263, ISO 14269
Test methods and criteria for evaluating the environment in the operator's cabin (Public Works and Agriculture)

Air quality

Protection against dust, pollen, vapours and aerosols from toxic products
Homogeneity and ergonomics of air distribution

Standards: EN 15695
Protection of the operator against hazardous substances
Standards: ISO 3737
Test methods for pressurisation systems.

Operator comfort

Thermal environments standards

Standards: NF EN 10551
Evaluation of the influence of thermal environments using subjective judgement scales.

Testing and certification for manufacturers


Anticipating future needs, innovation, simulating imagined solutions, and developing new strategies are at the heart of the daily concerns of SNDC's teams and management. Each year, SNDC devotes 7% of its total payroll to R&D, the main investment item in an innovation strategy based on the filing of numerous patents.

roof-mounted air-conditioning innovation

Roof-mounted air-conditioning

SNDC's "Plug & Play" roof-mounted air-conditioning concept combines all the functions dedicated to air-conditioning and treatment in a monoblock structure. This innovative concept meets the requirements of category 4 cabins in accordance with EN15695 for the protection of the operator against hazardous substances in self-propelled agricultural tractors and sprayers.

Functions: Heating, climate control, recirculation and fresh air filtration, ventilation and air distribution, defogging and de-icing, cabin pressurisation, automatic temperature controller (ATC).

Accessories: Car radio, speakers, overhead lighting, headlights, wipers, light switches, all customer accessories.

  • Operator benefits:
    • Increased visibility
    • Thermal Comfort and Air Quality
    • Performance
    • Accessibility and maintenance
    • Compliance with EN15695 Category 4 cabin requirements
  • Manufacturer's benefits:
    • Guarantee of performance and compliance with EN15695
    • Simplification of comfort and control interfaces
    • Optimisation of the overall cost of the cabin
    • Simple and quick assembly in chain
SKIMO electric innovation

Low voltage electrical solutions

The experience acquired by SNDC for more than 10 years on specific OEM solutions derived from the SKIMO standard range of low voltage air-conditioning systems, allows SNDC to offer its customers the best power consumption-performance ratio on the market from 12 to 120 volts.

SNDC's low voltage heating and air-conditioning solutions are suitable for a wide range of applications, both in-vehicle and off-road in harsh environments.

unité électrique CWA
SNDC model

Thermal management of electric and hybrid vehicles

SNDC assists its customers in the design of highly complex thermal management solutions for electric and hybrid vehicles, in order to jointly meet the needs of the air-conditioning and heating systems, and to maintain battery temperature to optimise their longevity.

HVAC system power consumption, comfort expected by the operator, maintenance of battery temperature, energy recovery, are all parameters to be controlled which constitute the main challenges of thermal management.

HVAC control system

HVAC control system

Many manufacturers do not need to control the air-conditioning system with an independent ATC (Automatic Temperature Control), by centralising the information and commands on the control screen of their machine or vehicle, via the auxiliary function control computer.

SNDC implements communication solutions between the cabin thermal controller, in charge of controlling the various thermal comfort functions, and its customer's ECU by adapting to the various market protocols.