Inwarmte
InWarmte is a Dutch sustainable heating company and Essent subsidiary that develops, operates, and manages district heating networks powered by geothermal energy and WKO storage, delivering subscription-based heat to over 15,000 Dutch residential and commercial customers.
- Company typePrivate
- Founded2017
- HeadquartersUtrecht, Netherlands
- Headcount11–50
- GTM typeB2B and B2C
- OfferingServices
What Inwarmte does
InWarmte is a Dutch sustainable heating company headquartered in Utrecht that develops, operates, and manages collective heating systems (collectieve warmtesystemen) for residential and commercial customers. Its core technology centers on district heating networks (warmtenetten) that deliver heat sourced from geothermal energy (aardwarmte) and WKO (warmte- en koudesystemen / Aquifer Thermal Energy Storage) installations, supplemented by heat pump systems available for rental. The flagship asset is Warmtenet Delft, a geothermal-fed district heating network anchored by partnerships with housing corporations Woonbron, Vidomes, Stedelink, and DUWO, and the Municipality of Delft, with Hogeschool Inholland as its first major commercial connection. Additional network builds are in progress in Urk (Energienet Urk) and Koningswei, and the company expanded its operational footprint via the December 2025 acquisition of DBH's heat network exploitation portfolio.
InWarmte generates revenue primarily through subscription-based sustainable heat delivery to connected households and businesses, with customers billed via monthly advance payments (voorschotbedrag) settled after contract end. Complementary revenue streams include heat pump system rentals under managed-service terms and development/operation services for sustainable energy installations. Customer engagement is direct-to-consumer through the Mijn InWarmte customer portal and iOS/Android apps, combined with sales-led outreach to housing corporations, real estate developers, and large commercial customers (grootzakelijke partijen). Pricing is not publicly disclosed and is provided on a quote basis.
The company operates as a private subsidiary of Essent, a major Dutch energy company, which provides long-horizon investment capital (20–30 year infrastructure cycles) and operational stability. With approximately 35 employees, InWarmte is a compact operator running an infrastructure-heavy, capital-intensive business across multiple regional networks in the Netherlands. The customer base exceeds 15,000 residential households and business customers, served through regional district heating networks, a self-service digital portal, partner channels with housing corporations and developers, and direct customer service operations.
Inwarmte firmographics
Firmographics- Name
- Inwarmte
- Legal name
- InWarmte
- Website
- https://inwarmte.nl
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- InWarmte is a Dutch sustainable heating company and Essent subsidiary that develops, operates, and manages district heating networks powered by geothermal energy and WKO storage, delivering subscription-based heat to over 15,000 Dutch residential and commercial customers.
- Ownership category
- akta.pro rank
Inwarmte industry classification
Industry- Product category
- District Heating Services
- NAICS
- Steam and Air-Conditioning Supply (22133), Steam and Air-Conditioning Supply (221330)
- SIC
- Steam & Air-Conditioning Supply (4961), Cogeneration Services & Small Power Producers (4991)
- akta.pro primary industry
- District Heating & Cooling Thermal Storage (Network-Integrated TES) (EUAFANAH)
Keywords
Where Inwarmte is headquartered
LocationHeadquarters
- HQ city
- Utrecht
- HQ country
- Netherlands
- HQ region
- Europe
Offices1 record
Markets served
Inwarmte business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Infrastructure, Operations, Personnel, Technology or R&D, Marketing or Sales
Revenue model
- Sustainable Heat Delivery: Supply of sustainable heat and cold to residential and business customers through connected heating networks. Revenue generated from ongoing heat supply contracts with households and commercial entities.
- Heat Pump System Rental: Rental of heat pump systems (warmtepompsysteem) to customers under rental terms with associated service and maintenance.
- Development and Operation of Energy Systems: Development, exploitation, and management of sustainable energy installations for customers including new installations, system takeovers, and optimizations.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Heat supply service with monthly billing |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels5 records
Inwarmte product offering
Product offeringCore offering
InWarmte develops, operates, and manages collective district heating networks (warmtenetten) that deliver sustainable heat and cold to connected residential and commercial buildings in the Netherlands. The heat supply is sourced primarily from geothermal energy (aardwarmte) and supported by WKO seasonal thermal storage systems and rental heat pump installations. Customers subscribe to monthly heat supply service with billing through the Mijn InWarmte customer portal and mobile apps.
Product overview
InWarmte is a sustainable heating and cooling company that develops, operates, and manages collective heat network systems for residential and commercial customers. The core offering consists of district heating networks (such as Warmtenet Delft) that deliver geothermal heat, supported by WKO (heat and cold storage) installations and heat pump systems available for rental. Digital services include the Mijn InWarmte customer portal (web and mobile app) for self-service management of heat connections, consumption monitoring, and billing.
Differentiator
Problem solved
Functional benefit
Products and services
- Sustainable Heat Delivery (Duurzame warmtelevering) Subscription-based delivery of sustainable heat and cold to residential households and businesses connected to InWarmte's district heating networks, with monthly billing through the Mijn InWarmte customer portal.
- Warmtenet Delft A district heating network supplying sustainable geothermal heat to residential housing corporations and commercial customers in Delft, designed to serve 6,000 rental homes with capacity for thousands more in the Voorhof and Buitenhof neighborhoods.
- WKO-systemen (Warmte- en Koudeopslag)
Companies that use Inwarmte
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles4 records
Inwarmte technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Inwarmte partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered core.
- DBHcoreInWarmte acquired the exploitation portfolio of DBH's heat networks, expanding its operational footprint in sustainable heating infrastructure.
- NetVerdercoreNetVerder manages the Warmtenet Delft heat network infrastructure as part of the collaborative partnership for sustainable heating solutions in Delft.
- Geothermie Delft (GTD)coreProvides geothermal energy from Delft underground sources to supply the Warmtenet Delft project with sustainable aardwarmte (earth heat).
- Gemeente Delft (Municipality of Delft)coreCollaborating municipality in the Warmtenet Delft project, supporting the transition to sustainable heating for the city aiming for climate neutrality by 2050.
- WoonbroncoreHousing corporation partner in Warmtenet Delft, with commitment to connect 6,000 rental homes to sustainable heating.
- VidomescoreHousing corporation partner in Warmtenet Delft project for sustainable heating connections.
- StedelinkcoreHousing corporation partner in Warmtenet Delft project for sustainable heating connections.
- DUWOcoreHousing corporation partner in Warmtenet Delft project for sustainable heating connections.
Scale indicators3 records
Recent moves6 records
Expansion highlights6 records
Inwarmte competitors and assessment
Company assessmentDirect peers
- Warmtebedrijf Rotterdam: Warmtebedrijf Rotterdam operates a large-scale district heating network in Rotterdam serving households and commercial buildings — a direct comparable in product, geography (Netherlands), and customer base.
- Ennatuurlijk: Ennatuurlijk is a Dutch district heating operator serving tens of thousands of households and businesses with sustainable and residual heat sources — a closely matched peer in scale, geography, and product offering to InWarmte.
- HVC (Huisvuilcentrale Noord-Holland): HVC operates district heating networks in the Netherlands powered by waste-to-energy and biomass, serving municipalities and housing corporations — comparable network-integrated heat utility serving similar residential and institutional customers.
- Eteck: Eteck develops and operates local sustainable heating and cooling networks (WKO) for Dutch housing corporations and developers — directly comparable as a smaller-scale Dutch district heating/WKO operator with overlapping customer base.
- Vattenfall Warmte Nederland: Vattenfall operates district heating networks across multiple Dutch cities, supplying sustainable and conventional heat to residential and commercial customers — directly comparable network-integrated heat supplier serving similar Dutch end markets.
- Eneco (Warmte / Stadshaven): Eneco operates one of the largest district heating networks in the Netherlands, including geothermal and biomass-fed heat networks serving residential and commercial customers — directly comparable in product offering, customer base, and business model to InWarmte.
Others
- Geothermie Delft (Aardwarmte Delft): Geothermie Delft supplies geothermal heat from underground reservoirs for the Warmtenet Delft project — a direct upstream partner and partial peer in the geothermal-based district heating value chain in which InWarmte participates.
- Netaanleg / Hydrone (consortium): NetVerder manages district heating infrastructure including the Warmtenet Delft network as a co-development partner to InWarmte — an adjacent infrastructure operator with overlapping activity in Dutch district heating asset management.
Regional players
- Remeha: Remeha is a leading Dutch manufacturer and supplier of heating systems including heat pumps and boilers, addressing similar end-customer needs for sustainable heat — comparable in market segment (Dutch residential/commercial heating) but as a hardware provider rather than network operator.
Broad incumbents
- Engie Nederland: Engie operates district heating networks and broader energy solutions across the Netherlands as part of its multinational utility portfolio — comparable in district heating activity but with a much wider service portfolio than InWarmte.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Inwarmte social profiles
Digital presenceInwarmte financial estimates
Financial estimateRevenue estimate
Valuation estimate
Inwarmte leadership team
Management profileNumber of profiles
Profiles1 record
Inwarmte funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Inwarmte M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Inwarmte
What does Inwarmte do?
InWarmte develops, operates, and manages collective district heating networks (warmtenetten) that deliver sustainable heat and cold to connected residential and commercial buildings in the Netherlands. The heat supply is sourced primarily from geothermal energy (aardwarmte) and supported by WKO seasonal thermal storage systems and rental heat pump installations. Customers subscribe to monthly heat supply service with billing through the Mijn InWarmte customer portal and mobile apps.
Is Inwarmte a public or private company?
Inwarmte is a private company. It is classified as corporate owned and is currently operating.
When was Inwarmte founded?
Inwarmte was founded in 2017. It employs 11 to 50 people.
Where is Inwarmte based?
Inwarmte is headquartered in Utrecht, Netherlands, in the Europe region.
How does Inwarmte make money?
Three revenue lines are on record. Sustainable Heat Delivery is the primary driver. The others are heat Pump System Rental and development and Operation of Energy Systems.
Who are Inwarmte's main competitors?
Direct peers on record are Warmtebedrijf Rotterdam, Ennatuurlijk, HVC (Huisvuilcentrale Noord-Holland), Eteck, Vattenfall Warmte Nederland and Eneco (Warmte / Stadshaven). Others are Geothermie Delft (Aardwarmte Delft) and Netaanleg / Hydrone (consortium). Remeha is listed as a regional player. Engie Nederland is listed as a broad incumbent.
Does Inwarmte have an API?
No public API is recorded for Inwarmte.
What industry is Inwarmte in?
Inwarmte's product category is District Heating Services. Its primary akta.pro industry code is EUAFANAH, District Heating & Cooling Thermal Storage (Network-Integrated TES). Its NAICS code is 22133 and its SIC code is 4961.