Durena AG

What Durena AG does

Durena AG is a privately held Swiss engineering firm founded in 1990 and headquartered in Lenzburg, Canton Aargau, with a second office in Zürich. The company provides energy engineering and consulting services with a core specialization in district heating (Fernwärme) network planning, energy center design, and decarbonization of heating infrastructure. Service scope spans feasibility studies, hydraulic and pipe routing engineering, 3D-CAD-based energy center layout, heat pump integration, energy storage design, waste heat recovery from wastewater and waste-to-energy plants, and construction management through commissioning. Specialty capabilities include BAFU-accredited verification of CO2 emissions monitoring reports for EHS companies under the Swiss CO2 Act, Energo-certified operational optimization for existing buildings, Pinch analysis for industrial energy optimization using the PinCH software from Hochschule Luzern, and ultrasonic compressed air leak detection for industrial facilities.

Durena serves three principal customer segments: Swiss municipal and regional utilities operating district heating and waste-to-energy infrastructure (including Limeco, ERZ, EWZ, AEW, Regionalwerke AG Baden, EBL, WWZ, IB Langenthal, and Energie Oberkirch AG), industrial and commercial energy consumers covered by the Energie Agentur der Wirtschaft (EnAW), and large industrial facilities seeking waste heat and energy efficiency optimization (CABB, Biotta, BioFresh, RehaClinic Bad Zurzach). The business model is project-based professional services revenue from engineering and planning mandates, complemented by recurring CO2 levy exemption consulting fees through EnAW moderation covering approximately 100 companies.

The company underwent a generational leadership transition in early 2026, with Thomas Weyermann, Ruedi Zutter, and Dr. Gilles Maag assuming the Geschäftsleitung from Othmar Arnold, René Nijsen, and Daniel Zürcher, who remain as board members and senior consultants. Durena operates exclusively within Switzerland, with marquee project track records including the Limeco Regiowärme expansion (>CHF 100M infrastructure investment), the 6 km Hagenholz-Josefstrasse connecting pipeline for ERZ, and the 7 km Zollikon district heating network for Werke am Zürichsee.

Name

Durena AG

Legal name

Durena AG

Website

https://durena.ch

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

11–50 employees

Short description

Durena AG is a Swiss energy engineering firm specializing in district heating network planning, energy center design, and decarbonization consulting for municipal utilities, waste-to-energy operators, and industrial clients across Switzerland, operating from Lenzburg and Zürich.

Ownership category

akta.pro rank

Product category

Energy Engineering & District Heating Consulting

NAICS

Steam and Air-Conditioning Supply (221330)

SIC

Cogeneration Services & Small Power Producers (4991), Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

Waste Heat Recovery & Heat Integration (HRSG/ORC, Pinch Analysis, Heat Exchangers) (EUABAJAF)

akta.pro secondary industries

Civil & Site Works EPC (Earthworks, Roads, Drainage, Foundations) (EUAEADAA), EMS / SCADA / DERMS Controls Integration for Storage (EUAEAEAG), Hybrid Renewable + Storage Plant Integration (Solar+Storage, Wind+Storage) (EUAEAEAE)

Keywords

• District heating engineering
• Energy center planning
• Decarbonization consulting
• Industrial energy efficiency
• CO2 emissions verification

Headquarters

HQ city

Lenzburg

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Engineering and Planning Services: Durena provides engineering and planning services for district heating networks, energy centers, and renewable energy installations. Revenue is generated through project-based professional service mandates from utilities, municipalities, and industrial clients. Projects range from individual heating center upgrades to multi-kilometer district heating network planning.
2. CO2 Abgabebefreiung (CO2 Levy Exemption) Consulting: Moderator and KMU consultant services for the Energie Agentur der Wirtschaft (EnAW), supporting approximately 100 companies in obtaining CO2 levy exemption under the Swiss CO2 Act. Revenue derived from consulting fees for energy analysis, target agreements, and annual monitoring support.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Durena AG is an energy engineering firm that plans and project-manages district heating (Fernwärme) networks, energy centers, and renewable energy installations for Swiss municipal utilities, regional energy providers, and industrial clients. Its services span feasibility studies, hydraulic network and pipe routing design, 3D-CAD energy center planning, construction management, commissioning, and specialized consulting such as BAFU-accredited CO2 emissions monitoring verification, EnAW CO2 levy exemption moderation, Pinch analysis, and compressed air leak detection.

Product overview

Durena AG is an energy engineering and consulting firm specializing in district heating (Fernwärme) networks, energy centers (Energiezentralen), and decarbonization solutions. The company offers services including planning and engineering of heating networks, energy center design, biomass and biogas systems, heat pump installations, geothermal solutions, and energy efficiency consulting. Services include EnAW (Energy Agency of the Economy) moderation for CO2 exemption support, pinch analysis, pressure air analysis, and BAFU-accredited monitoring report verification. The firm serves municipal utilities, industrial clients, and commercial customers across Switzerland with a focus on sustainable heating solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• District Heating Network Engineering & Planning End-to-end engineering, hydraulic planning, pipe routing, construction management, and commissioning of district heating (Fernwärme) networks for Swiss municipal and regional utilities. Covers multi-kilometer KMR pipework (e.g., up to DN200), house connections (Casaflex sections), noise-free installation using electrothermal pre-stressing, and integration of lake, wastewater, biomass, or waste-to-energy heat sources.
• Energy Center Design & 3D-CAD Planning 3D-CAD-based planning of complex heating centers and energy installations, including compact pipe routing for biomass, biogas, heat pump, and waste-heat systems. Reference projects include Limeco Shoppi Spreitenbach and Biotta/BioFresh wood steam center.
• EnAW CO2 Levy Exemption Consulting Moderator and KMU consultant services for the Energie Agentur der Wirtschaft (EnAW), supporting approximately 100 companies in obtaining CO2 levy exemption under the Swiss CO2 Act. Includes energy analyses, target agreements with the Swiss Confederation, and annual monitoring. Covers EnAW energy model groups for foundries, Aargau, and beverages.
• BAFU-accredited CO2 Emissions Monitoring Verification Independent BAFU-accredited verification of CO2 emissions monitoring reports for EHS (Emissionshandelssystem) companies under the Swiss CO2 Act.
• Industrial Pinch Analysis for Waste Heat Recovery Pinch analysis using PinCH software (developed by Hochschule Luzern with BFE and EnAW support) to identify waste heat recovery opportunities across entire industrial production sites, delivered with BFE financial support.
• Compressed Air Leak Detection & Analysis Ultrasonic leak detection and analysis of compressed air systems in industrial settings, quantifying savings potential and supporting funding applications for remediation (e.g., for clients such as CABB).
• Energo Operational Optimization Projects As a certified Energo engineering office, Durena conducts operational optimizations and modernization projects under the EnergieSchweiz federal building energy efficiency program, targeting measurable energy savings (e.g., at least 12% over 5 years at RehaClinic Bad Zurzach).

Quantifiable outcome

• 180 tonnes CO2 saved annually by replacing oil heating at Dietikon Bahnhof with district heating (80,000 liters heating oil avoided)
• +4 more outcomes

Named customers12 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

16 partnerships are on record, tiered core and minor.

• LimecocoreStrategic or Co-development Partner · 1 January 2017Limeco is a major municipal waste-to-energy operator and district heating provider in the Limmattal region. Durena has served as Limeco's comprehensive engineering partner since 2017, providing client representation, overall project management, strategic expansion planning, business plans, KVA waste heat utilization concepts, coordination of specialist planners, and all district heating network and household connection planning. Investment volume of Limeco Regiowärme exceeded CHF 100 million by end of 2020, with ongoing expansion.
• EnergocoreStrategic or Co-development Partner · 1 January 2016Energo is Switzerland's leading competence center for overall energy efficiency in existing buildings, operating under the EnergieSchweiz federal program. Durena is officially certified as a contracted engineering office of Energo since 2016, conducting operational optimizations and modernization projects for Energo clients such as RehaClinic Bad Zurzach, targeting at least 12% energy savings.
• Energie Oberkirch AGminorStrategic or Co-development Partner · 1 January 2013Energie Oberkirch AG is a 100% publicly-owned energy company of the municipality of Oberkirch, formed to operate a wood chip heating center and district heating network. Durena was engaged as planning office for the wood chip heating center. The AG was founded with CHF 500,000 share capital.
• ERZ Entsorgung + Recycling ZürichcoreStrategic or Co-development PartnerERZ is a Zurich municipal waste management and recycling company operating waste-to-energy plants. Durena serves as process engineer for major ERZ projects including the 6 km district heating connecting pipeline between Hagenholz and Josefstrasse, the Energiezentrale Josefstrasse, and secondary district heating networks connecting residential buildings. ERZ represents one of Durena's most significant long-term partnerships.
• Energie Agentur der Wirtschaft (EnAW)coreStrategic or Co-development PartnerEnAW is the federal agency supporting Swiss companies in obtaining CO2 levy exemption under the Swiss CO2 Act. Durena serves as EnAW moderator and KMU consultant, supporting approximately 100 companies in energy efficiency improvement and CO2 emission reduction target agreements with the Swiss Confederation. Covers EnAW energy model groups for foundries, Aargau, and beverages sectors.
• Bettschart Bauingenieure GmbHminorImplementation/ SI/ Consulting PartnerCivil engineering firm responsible for civil engineering planning and construction management for the district heating network project in Zollikon for Werke am Zürichsee.
• Inno Montage AGminorImplementation/ SI/ Consulting PartnerPipe construction company executing the pipework for the district heating network in Zollikon (Werke am Zürichsee project).
• Keller Frei AGminorImplementation/ SI/ Consulting PartnerCivil works contractor responsible for groundworks and excavation for the district heating network in Zollikon (Werke am Zürichsee project).
• Emch+Berger AG ZürichminorImplementation/ SI/ Consulting PartnerCivil engineering firm collaborating with Durena on ERZ secondary district heating networks in Zürich, including planning and construction management.
• WWZ Energie AGminorStrategic or Co-development PartnerWWZ Energie AG is a regional energy utility in Zug. Durena provides pipe routing planning for the WWZ Circulago district heating and cooling expansion project in Zug and Baar, including SBB railway crossing via microtunnel.
• Ryser Ingenieure AGminorImplementation/ SI/ Consulting PartnerEngineering firm collaborating with Durena on the Wärmeverbund Worblental project, including directional drilling under the Aare river.
• Energie 360° AGcoreStrategic or Co-development PartnerEnergie 360° AG is a Swiss energy company specializing in renewable energy and district heating. They were selected as contractor through Durena-initiated contracting tender for the Embrach Sporthalle Breiti project. They also initiated the Wärmeverbund Dreispitz Embrach (which Durena had initiated on behalf of the municipality) and Wärmeverbund Gattikon.
• HODEL SHLKminorImplementation/ SI/ Consulting PartnerPipe construction company responsible for pipe routing work on the WWZ Circulago project crossing under SBB railway tracks.
• Lehmann2000 AGminorImplementation/ SI/ Consulting PartnerPipe construction company consistently engaged by Durena for district heating pipework on multiple projects including ERZ secondary networks and Limeco network expansions.
• Heinz Gertsch AGminorImplementation/ SI/ Consulting PartnerInstallation company responsible for heat transfer station installations in ERZ secondary district heating networks and Limeco projects.
• Zweckverband Abfallverwertung Bazenheid (ZAB)minorStrategic or Co-development PartnerZAB operates the waste-to-energy plant in Bazenheid. Durena serves as specialist planner and construction manager for the district heating supply to Wil (SG), including the transfer pipeline bringing waste heat from the ZAB facility to the supply areas.

Scale indicators10 records

Recent moves5 records

Expansion highlights5 records

Market position

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/durena-ag

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Durena AG