Retrofit solution references
HVAC control system retrofit
Modern HVAC solutions for locomotive cabins where driver comfort, reliability and maintainability are critical. Lumikko can support system replacement, integration and adaptation to existing locomotive structures and interfaces with experience of + 1000 locomotive HVAC units delivered.
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Locomotive HVAC retrofit
Modern HVAC solutions for locomotive cabins where driver comfort, reliability and maintainability are critical. Lumikko can support system replacement, integration and adaptation to existing locomotive structures and interfaces with experience of + 1000 locomotive HVAC units delivered.
Read about Lumikko's delivered systems
Restaurant car refrigeration retrofit
Restaurant car refrigeration systems must operate reliably in demanding railway conditions and limited installation spaces. Lumikko provides retrofit solutions for refrigeration equipment used in railway catering and food storage applications.
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Tram HVAC Retrofit
Older tram fleet usually don’t have air-conditioning. Lumikko provides Tram HVAC retrofit projects which make older fleet more comfortable and modern. As a example Lumikko developed roof-mounted HVAC system with ducting to Helsinki’s older articulated trams.
Learn more about our railway projectsUpgrade existing railway vehicles with modern thermal systems
Railway retrofit projects are needed when existing systems no longer meet current requirements for comfort, reliability, maintainability or spare part availability. Lumikko helps operators and fleet owners modernize thermal systems without replacing the vehicle itself.
Strong retrofit expertise for railway HVAC and refrigeration
Lumikko has strong retrofit experience in railway applications, especially locomotive HVAC systems, tram HVAC systems, HVAC control systems and refrigeration equipment for restaurant cars. Our role is to adapt modern technology to the realities of existing rolling stock: limited space, fixed interfaces, vehicle-specific requirements and long lifecycle expectations.
Designed around existing vehicle constraints
Retrofit projects require more than supplying a new unit. The solution must fit the existing vehicle, connect to existing systems and support practical installation, maintenance and operation.
Key constraints:
- Existing installation space
- Mechanical and electrical interfaces
- Airflow and ducting
- Cooling and refrigeration circuits
- Control system compatibility
- Maintenance access
- Railway vibration and operating conditions
- Documentation and project-specific requirements
From existing system assessment to new solution
1. Existing system review
2. Retrofit concept and technical scope
3. Mechanical, electrical and control integration
4. Manufacturing and adaptation
5. Testing and documentation
6. Installation, lifecycle support and spare parts
Retrofit or overhaul?
Overhaul is typically focused on restoring or rebuilding existing equipment for continued use. Retrofit is needed when the system, controls or technology must be upgraded, replaced or adapted to meet new operational requirements.
| Overhaul | Retrofit |
| Restores existing equipment | Integrates updated or new technology |
| Focuses on lifecycle extension | Focuses on modernization and adaptation |
| Uses the original system as the basis | May redesign controls, interfaces or system architecture |
| Suitable when the existing concept still works | Suitable when new performance or functionality is needed |
