Plan Energy Infrastructure Efficiently. Execute Projects with Technical Precision.
District Heating. Buildings. Digitalisation.
Planning, components, project management and automation from a single source.
Three Fields of Expertise. One Technical Contact.
District Heating & Pipeline Technology
Technical expertise for district heating systems, pipeline infrastructure and energy distribution.
- District Heating Pipes & Steel Pipes
- Flanges & Expansion Joints
- Support Systems & Accessories
- Engineering & Project Management
- Tender Support
Efficient Buildings
Integrated solutions for optimising energy consumption in commercial buildings and industry.
- Heat Pumps & LED Systems
- PV Systems & PScoat
- Electricity & Gas Procurement
- Energy Optimisation
Digital Solutions
AI-powered processes, project management and automation. Powered by SUJARION.
- AI Project Management
- AI Back Office & Automation
- Document Automation
- Knowledge Management
Why Rieger Energietechnik AG?
Because energy projects need not just products, but technical clarity, reliable components and clean project management.
From First Requirement to Implementation
Enquiry & Briefing
Submit a project request, clarify requirements, initial technical assessment.
Technical Review
Analysis of project documents, feasibility and component suitability.
Proposal & Planning
Technical proposal, documentation and project schedule.
Implementation & Support
Delivery, installation support and personal project accompaniment through to completion.
Utilities & Municipalities
Urban and regional energy utilities as well as municipalities with their own district heating networks.
Planning Firms & EPC Companies
Engineering and planning firms as well as general contractors requiring technical components and engineering support.
District Heating Operators
Operators of existing district heating networks seeking components, extensions or technical consultation.
Industry & Commerce
Industrial operations and commercial properties requiring heat pumps, LED, PV and energy optimisation.
Property Owners & FM
Owners and facility managers looking to reduce energy costs and sustainably increase building value.
Pipeline Contractors
Construction companies in pipeline and civil engineering requiring reliable component suppliers and technical support.
Projects That Speak for Themselves.
District Heating Network Expansion
Delivery and engineering support for district heating pipes, flanges and support systems during the expansion of a municipal district heating network.
Energy Optimisation for Commercial Buildings
Combination of LED conversion, heat pump integration and electricity procurement optimisation for a mid-sized manufacturing company.
Steel Pipe and Flange Delivery
Technical procurement and delivery coordination for an EPC contractor in the German industrial sector — including tender support and documentation.
Reference in Development
Your next project could be featured here. We work discreetly, carefully and with full technical commitment — from the very first conversation.
Start a Project Conversation →
Technical Expertise.
Personal Responsibility.
Sebastian Rieger founded Rieger Energietechnik AG with a clear ambition: engineering, components and project management from a single source — without detours, without anonymous structures.
With long-standing industry experience in district heating, pipeline technology and building efficiency, he accompanies projects from the first conversation to technical handover — personally, directly, reliably.
"I take personal responsibility for every project — that is not a marketing promise, that is our business model."
Submit a Project Request or Request a Callback
Request a Callback
No specific project yet, but questions? We will call you back — at a time of your choosing, without waiting.
Response within one working day
Sebastian Rieger personally
Which district heating components does Rieger Energietechnik offer?
We supply district heating pipes, steel pipes, flanges, expansion joints, support systems and accessories for district heating and pipeline projects in Switzerland, Germany and Austria.
For which projects is Rieger the right partner?
We work with utilities, municipalities, district heating operators, EPC companies and planning firms to deliver district heating networks, building efficiency projects and digital energy solutions.
What makes your engineering approach special?
We combine component delivery with technical consultation, tender support and personal project management. Sebastian Rieger is directly involved — no anonymous customer service.
What does "Digital Solutions powered by SUJARION" mean?
SUJARION is our technology partner for AI-powered processes. We integrate project management automation, document processing and knowledge management into our workflows — and make this infrastructure available to clients on request.
How do I start a project with Rieger?
Submit a project request via the form or call us directly. We will get back to you within one working day with an initial technical assessment.