Resolia

What Resolia does

Resolia is a Belgian engineering consultancy (SRL Resolia) headquartered in Louvain-la-Neuve that specializes in the decarbonization of thermal energy. The company delivers three integrated service lines: strategic consultancy and decarbonation masterplanning; engineering and design of thermal energy networks (including waste-heat recovery, renewable sourcing, and 5th-generation low-temperature district heating/cooling); and end-to-end geothermal project development covering open-loop, closed-loop, and horizontal systems. Its client base is concentrated in Belgium, primarily Wallonia and the Brussels-Capital Region, and includes municipalities (Ville de Charleroi, Ville de Fleurus), regional public bodies (Région de Bruxelles-Capitale, SLRB), heavy industrial players supplying waste heat (Industeel, Thy-Marcinelle), property developers, and tertiary-sector clients such as Partenamut Liège and UCLouvain.

The company's underlying technology stack combines AI-driven real-time network regulation, digital twins of building portfolios, and big-data integration for territorial energy modeling. These tools support consultative engagements from pre-feasibility through hydrogeological study, system sizing, regulatory navigation, construction oversight, and operational optimization. Resolia also brokers access to the Walloon AMUREBA subsidy regime as a service add-on.

Resolia generates revenue exclusively through project-based professional services contracts priced per engagement via direct consultation. Distribution is entirely direct, relying on consultative field sales, public procurement participation (marchés publics), and content-led thought leadership through a corporate blog, LinkedIn, newsletter, and conference circuit (GeoTHERM, Heat2Net, AILouvain). Notable engagements include the Charleroi Porte Ouest district heating network, described as the largest in Wallonia with roughly 100 MW of waste-heat recovery potential supplying 25,000–40,000 home equivalents.

Name

Resolia

Legal name

SRL Resolia

Website

https://resolia.energy

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Resolia is a Belgian engineering consultancy headquartered in Louvain-la-Neuve that provides strategic consultancy, thermal energy network engineering, and geothermal system design for public authorities, industrial clients, property developers, and the tertiary sector in Belgium.

Ownership category

akta.pro rank

Product category

Thermal Energy Engineering Consulting

NAICS

Engineering Services (541330), Environmental Consulting Services (541620)

akta.pro primary industry

Permitting, Siting & Environmental Impact (EIA/NEPA) Advisory (EUAMANAB)

akta.pro secondary industry

Sustainability & ESG Consulting (BPAHACAK)

Keywords

• District heating engineering
• Geothermal consulting services
• Thermal energy decarbonation
• Heat network design
• Energy strategy consulting

Headquarters

HQ city

Louvain-la-Neuve

HQ country

Belgium

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Strategic Consultancy & Decarbonation Studies: Resolia provides strategic consulting services to public authorities and private clients, including energy potential studies, geographic energy audits, territorial energy planning, decarbonation trajectory design, technical and strategic consultancy, legal/economic/regulatory expertise, and public procurement support. Revenue is generated through project-based consulting engagements.
2. Heat Network Engineering & Design: Full engineering services for thermal energy networks including concept development, power definition, system sizing, technical component identification, procurement recommendations, and owner assistance through construction supervision. Billed as professional services on a project basis.
3. Geothermal Project Development: From pre-feasibility through complete feasibility studies, hydrogeological assessments, system sizing, regulation optimization, resource sustainability analysis, and construction oversight for geothermal installations. Professional services revenue model.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Resolia is a specialized engineering consultancy that delivers strategic consultancy, design/engineering, and operational advisory for thermal energy decarbonation projects. Its portfolio centers on three core offerings: (1) Strategy & Consultancy for decarbonation masterplanning, energy potential studies, and territorial energy planning; (2) Thermal Energy Network engineering including waste heat recovery, network design, permitting, and optimization; and (3) Geothermal system expertise covering feasibility, hydrogeological study, sizing, regulation, and construction oversight. Services span from initial feasibility through construction supervision and operational optimization for public authorities, industrial clients, property developers, and the tertiary sector.

Product overview

Resolia offers a portfolio of three interconnected core services for thermal energy decarbonation: Strategy & Consultancy for long-term decarbonation planning and masterplanning; Thermal Energy Networks for design, engineering, and optimization of district heating/cooling infrastructure; and Geothermal expertise for ground-source heating and cooling solutions. The company provides AMUREBA subsidies as a financial add-on and develops digital building twins as a strategic tool for energy planning. Services span from initial feasibility studies through construction oversight and operational optimization, supporting public authorities, industries, developers, and the tertiary sector in transitioning to renewable thermal energy.

Differentiator

Problem solved

Functional benefit

Products and services

• Strategy & Consultancy (Stratégie et Consultance) Strategic consultancy covering energy potential studies, geographic energy audits, territorial energy planning, masterplanning, decarbonation trajectories, technical and strategic consulting, and legal/economic/regulatory expertise for public authorities and private clients.
• Thermal Energy Networks (Réseaux d'Énergie Thermique) Full engineering services for thermal energy networks, including waste heat recovery and valorization, renewable sourcing, thermal storage, smart auditing, design and specification, permits and authorizations, owner assistance through execution monitoring, and operation, regulation, and optimization.
• Geothermal Expertise (Géothermie) Geothermal expertise encompassing feasibility studies, hydrogeological assessments, system sizing, regulation and optimization, resource sustainability analysis, and owner assistance with construction follow-up, covering open-loop groundwater, closed-loop borehole, and horizontal geothermal configurations.
• AMUREBA Subsidies Assistance (Primes AMUREBA) Advisory and administrative support service helping clients secure AMUREBA public subsidies for renewable energy projects in the Walloon Region, as part of decarbonation project financing.
• Masterplan / Plan Directeur Standalone strategic planning deliverable that organizes medium- and long-term actions for energy infrastructure decarbonation, defining necessary resources and a phased implementation roadmap for clients.
• Cooling as a Service District cooling service that transfers excess heat between zones using heat pump technology powered by renewables, delivering energy-efficient building cooling to commercial and institutional users.

Quantifiable outcome

• Industrial waste heat projects can recover approximately 100 MW of thermal energy (e.g., Charleroi Porte Ouest), sufficient to supply the equivalent of 25,000 to 40,000 homes with renewable heat
• +4 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability2 records

Feature5 records

Partnerships

Eight partnerships are on record, tiered core and supporting.

• SPW Energie (Service Public de Wallonie)coreStrategic or Co-development Partner · 2 April 2024Resolia participates in the Heat2Net conference organized jointly by the Tweed cluster and SPW Energie, demonstrating collaboration with the Walloon public energy authority on heat network and geothermal topics.
• IndusteelcoreStrategic or Co-development Partner · 7 September 2023Industeel is a key industrial partner in the Charleroi Porte Ouest heat network project. The company has established an ambitious plan to decarbonize its processes, including an internal heat network study currently underway, and will contribute industrial waste heat to the city-wide network.
• Thy-MarcinellecoreStrategic or Co-development Partner · 7 September 2023Thy-Marcinelle participates in the Charleroi Porte Ouest heat network project, contributing industrial waste heat as a source for the renewable thermal energy network serving the city.
• SLRB (Société du Logement de la Région de Bruxelles-Capitale)coreStrategic or Co-development PartnerResolia advises the SLRB on the management and operation of a new heat network serving public housing stock in the Brussels-Capital Region. This partnership demonstrates Resolia's role as trusted technical advisor to major public housing organizations.
• Ville de CharleroicoreStrategic or Co-development PartnerResolia was selected by the City of Charleroi to develop and structure the largest heat network in Wallonia (Porte Ouest project), recovering waste heat from local metallurgical industries to supply renewable thermal energy to city buildings and beyond.
• Région de Bruxelles-CapitalecoreStrategic or Co-development PartnerResolia conducted an evaluation of the potential for renewable heat and cold for the Brussels-Capital Region, producing a detailed cartography of renewable energy resources to guide regional decarbonation policy.
• European UniversitiessupportingStrategic or Co-development PartnerResolia collaborates with multiple European universities to remain at the forefront of thermal energy research and innovation, leveraging academic partnerships to support R&D output and technology advancement.
• Tweed ClustersupportingStrategic or Co-development PartnerResolia participates in events organized by the Tweed cluster (Walloon energy and environmental technology cluster), positioning itself within the regional cleantech ecosystem and contributing to knowledge sharing on heat networks and geothermal energy.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Sweco: Nordic engineering consultancy with energy transition and district heating practices serving public authorities across Belgium, the Nordics, and Northern Europe. Provides comparable services but as part of a multi-disciplinary infrastructure consultancy spanning water, transport, and buildings.
• WSP: Global engineering consultancy with a substantial energy transition and district heating/cooling practice. Competes for the same municipal and developer mandates in Benelux and across Europe, but as one of many service lines within a 70,000+ person professional services firm.
• COWI: Danish engineering consultancy with a recognized district energy and renewable heat infrastructure practice. Provides comparable heat network engineering and energy transition consulting, particularly across Northern European markets, but as part of a much broader infrastructure portfolio.
• Ramboll: Danish-headquartered global engineering consultancy with a well-established district heating and cooling practice serving municipalities across Northern Europe. Comparable services (heat network strategy, engineering, geothermal) but operates at significantly larger scale and broader portfolio.
• AFRY: Swedish engineering and design consultancy with an energy division covering district heating, geothermal, and renewable heat infrastructure. Overlaps with Resolia on heat network design and decarbonation consulting for public authorities across European markets.
• Equans: France-based multi-technical services firm (Engie spinoff) with a dedicated energy transition and district heating/cooling business across Belgium and Europe. Comparable in thermal network services but combines consulting with large-scale installation and operations.
• Royal HaskoningDHV: Dutch engineering consultancy with energy transition and district heating expertise serving public authorities across Benelux. Comparable on heat network strategy and engineering but operates across water, mobility, and aviation in addition to energy.
• Tractebel (Engie): Belgium-headquartered energy engineering consultancy with a large district heating, geothermal, and energy transition practice. Direct geographic and segment overlap with Resolia, but operates at much larger scale across the full energy value chain rather than specializing in thermal decarbonation.

Direct peers

• PlanEnergi: Danish non-profit consultancy specializing in renewable energy planning and district heating transformation. Closest comparable in business model: a small specialist firm focused on strategic decarbonation planning, heat network design, and renewable integration for public authorities — directly analogous to Resolia's niche positioning in Wallonia/Brussels.

Others

• Dalkia: French district heating and cooling operator and developer (EdF subsidiary) active in Belgium. Adjacent rather than directly competitive — Dalkia develops and operates thermal networks, whereas Resolia provides the upstream consulting and engineering that informs such developments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/resolia-energy

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Resolia