Höyrytys

What Höyrytys does

Höyrytys Oy is a Finnish private energy production services company headquartered in Kerava, operating the largest rapidly deployable mobile steam, heat, and electricity production fleet in the Nordic countries. Founded in 1959 and now a subsidiary of the WEST Invest Group, the company serves three primary customer verticals: district heating utilities (Helen, Fortum, Tampereen Energia, Keravan Energia, Varkauden Aluelämpö, Kotkan Energia, Pori Energia, Loimua, Savon Voima, ESE-Energia, Vantaan Energia, Jyväskylän Voima), industrial facilities (Stora Enso, Valio, DS Smith, Hämeenlinnan Osuusmeijeri), and critical infrastructure operators including hospitals (Lapin keskussairaala, Satasairaala). The company delivers tens of megawatts of steam and heat nationwide with sub-24-hour response times and a 24/7 nationwide service network spanning seven regional offices across Finland.

The company's core technology platform centers on mobile and stationary steam, heat, and electricity production assets that can run on electricity, liquid and gaseous fuels, biogas, natural gas, hydrogen, and fuel oils. Key proprietary elements include a fleet of Clayton steam generators (100 kW to 13 MW, used since 1959), INNIO Jenbacher gas engines (10–50 MW, distributed under a 25-year exclusive Finnish partnership), Zander & Ingeström emission-free electric boilers (low-voltage resistance and high-voltage electrode types), Bosch industrial boiler systems, and MobileESS portable electrical energy storage units (300 MWh capacity) sourced from sister company Enico Oy. Differentiating features include sub-24-hour nationwide deployment, fast start-up (5–15 minutes for Clayton units), hydro-heater units that connect in 15 minutes, and a 24/7 expert and maintenance network with statutory certifications for pressure equipment and gas systems.

Höyrytys generates revenue through a diversified mix of subscription-based backup energy agreements (monthly standby fees plus realized production charges, typically ~25% of equivalent new-plant investment), project-based engineering and installation services, recurring maintenance and statutory operational monitoring contracts, spare parts supply, and usage-based energy storage rental including revenue from Fingrid reserve and regulation electricity markets. Pricing is not publicly disclosed and is quote-based per engagement. The go-to-market motion is enterprise field sales targeting large utilities, industrial operators, and critical infrastructure via direct account managers and business development staff, supported by participation in industry events such as Vaasa EnergyWeek and content marketing through the company website and LinkedIn.

Name

Höyrytys

Legal name

Höyrytys Oy

Website

https://hoyrytys.fi

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

11–50 employees

Short description

Höyrytys Oy is a Finnish private energy services company operating the largest rapidly deployable mobile steam, heat, and electricity production fleet in the Nordics. It delivers 24/7 backup energy, maintenance, and expert services to district heating utilities, industrial facilities, and critical infrastructure across Finland.

Ownership category

akta.pro rank

Product category

Industrial Energy Services

NAICS

Steam and Air-Conditioning Supply (221330), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Turbine and Turbine Generator Set Units Manufacturing (333611), Power Boiler and Heat Exchanger Manufacturing (33241)

SIC

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

akta.pro primary industry

Thermal Power Plant O&M (Coal, Gas, Oil) (EUAEAGAA)

akta.pro secondary industries

Thermal Power Plant Modernization & Life Extension (Boiler/Turbine/Generator) (EUAEALAA), WtE Plant Development, EPC & O&M Services (Project delivery and operations) (EUAAAKAK)

Keywords

• Backup energy services
• Mobile steam boilers
• District heating solutions
• Industrial energy production
• Pressure equipment maintenance

Headquarters

HQ city

Kerava

HQ country

Finland

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Backup energy (varaenergia) services: Monthly fee-based standby agreements for backup energy capacity (heat, steam, electricity) with separate charges for realized production. Covers mobile plant delivery, transport, connections, operation supervision, and decommissioning as a turnkey service. Also available as ad-hoc rentals without long-term agreements.
2. Expert and project services: Project planning, engineering, installation, commissioning, and modernization of steam/heat/electricity plants. Includes design of turnkey energy production solutions tailored to customer needs, operating on a project fee basis.
3. Maintenance and operational monitoring services: Periodic and continuous operational monitoring of pressure equipment and gas systems, statutory inspections, on-call maintenance, and 24/7 emergency response. Delivered through service agreements customized per customer site, including monthly retainer and per-incident fees.
4. Spare parts supply: Supply of spare parts for gas engines, oil/gas burners, boilers, steam generators, pumps, valves, piping components, and electrical/automation equipment.
5. Energy storage rental and Fingrid reserve market participation: Rental of mobile electrical energy storage units to construction sites, events, and industrial customers. Revenue also generated by participating in Fingrid reserve and regulation electricity markets when storage units are not deployed with customers.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Höyrytys Oy provides mobile steam, heat, and electricity production solutions for district heating companies, industrial facilities, and critical infrastructure operators across Finland. Its core offering consists of backup energy services (delivering rapidly deployable mobile steam/heat plants and energy storage with sub-24-hour response), expert services (project planning, installation, operational monitoring, and statutory maintenance), and technology representation (Clayton, INNIO Jenbacher, Bosch, Zander & Ingeström, Enico equipment) integrated into turnkey energy production solutions.

Product overview

Höyrytys Oy is a service company providing comprehensive energy production solutions through three interconnected offerings: (1) Backup Energy Services (Varaenergiapalvelut) delivering mobile steam, heat, and electrical energy storage for rapid deployment nationwide with sub-24-hour response times; (2) Expert Services (Asiantuntijapalvelut) covering project planning, installation, maintenance, modernization, operational monitoring, and burner services; and (3) Technology Solutions representing world-class equipment brands including Bosch boiler systems, INNIO Jenbacher gas engines, Zander & Ingeström electric boilers, Enico energy storage (MobileESS), and Clayton steam generators. The portfolio ranges from 0-70 MW power capacity units, enabling turnkey delivery of steam, heat, and electricity production plants utilizing various energy sources including electricity, natural gas, biogas, hydrogen, and fuel oils.

Differentiator

Problem solved

Functional benefit

Products and services

• Varaenergiapalvelut (Backup Energy Services) Comprehensive mobile steam and heat plants, fuel tanks, and electrical energy storage solutions delivered as full-service offerings for both short-term and long-term energy needs, with nationwide 24/7 maintenance and response times under 24 hours. Targeted at district heating companies, industrial facilities, and critical infrastructure operators across Finland.
• Asiantuntijapalvelut (Expert Services) Project planning, maintenance, modernization, operational monitoring, and emergency maintenance services for steam and heat plants and gas engines, delivered through a nationwide expert network of qualified staff. Targeted at industrial and district heating customers requiring engineering and lifecycle support for energy production facilities.
• Varaenergiasopimus (Backup Energy Agreement) Contract-based backup energy service with monthly payments, arranging agreed capacity with qualified operators for round-the-clock delivery readiness, with pre-mapped connection points and documented delivery plans. Targeted at district heating utilities and industrial customers requiring guaranteed standby capacity.
• Käytönvalvonta (Operation Supervision) Statutory operation supervision for pressure equipment and gas systems, including certifications from Class B Boiler Operator to Chief Engineer, ensuring safe and reliable energy production facility operation. Targeted at industrial and energy customers required to maintain compliant oversight of pressure equipment.
• Huolto- ja kunnossapitopalvelut (Maintenance Services) Comprehensive maintenance services including periodic inspections, combustion system servicing, statutory operational monitoring, 24/7 emergency maintenance, and spare parts supply for steam/heat plants and gas engines. Targeted at industrial and district heating customers requiring ongoing lifecycle maintenance of energy assets.
• Asennuspalvelut (Installation Services) Professional installation services for energy production equipment including turnkey delivery of complete plant solutions, covering steam boilers, gas engines, electric boilers, and energy storage systems. Targeted at industrial and district heating customers undertaking new installations or modernization projects.
• Poltinhuollot (Burner Maintenance Services) Maintenance and servicing for oil, gas, and combination burners with seasonal maintenance programs and emergency repair capabilities. Targeted at industrial and district heating customers operating burner-based heating systems.
• Rakennushöyry (Construction Steam) Temporary steam supply services for construction and melting operations during winter season. Targeted at construction companies requiring seasonal heating, frost thawing from soil, or warm air supply via blowers.
• Spare Parts for Energy Production Equipment Wide selection of spare parts including circulating water pumps, pressure maintenance equipment, burners, steam system components, boiler parts, valves, piping, electrical and automation equipment, and gas engine parts. Targeted at customers maintaining their own steam, heat, and gas engine installations.
• MobileESS Energy Storage Rental Rental of portable electrical energy storage units (MobileESS 300 MWh) to construction sites, events, and industrial customers, with participation in Fingrid reserve and regulation electricity markets when units are not customer-deployed. Targeted at events and construction segments requiring emission-free temporary power.

Quantifiable outcome

• Backup energy agreement costs are approximately 25% of the investment cost of equivalent new backup production equipment
• +3 more outcomes

Named customers20 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

Feature7 records

Partnerships

Eleven partnerships are on record, tiered strategic, core and minor.

• Festivaalisähkö OystrategicStrategic or Co-development Partner · 1 July 2025Festivaalisähkö Oy was a key collaboration partner in deploying Höyrytys's mobile energy storage at the Ruisrock festival, enabling the new environmental-friendly energy solution for the event.
• WEST Invest GroupcoreOthersHöyrytys Oy is a subsidiary of WEST Invest Group, a Finnish family business providing water treatment and energy solutions for industrial and municipal clients. The group comprises WEST Invest Group Oy, Hyxo Oy, Höyrytys Oy, Ekomuovi Oy, KMV-tuotteet, Sakutek Oy, and Ubitec Oy. The group enables shared resources across companies for engineering, electrical, automation, and maintenance services.
• INNIO JenbachercoreTechnology or Integration25-year partnership with INNIO Jenbacher, a manufacturer of electricity-generating gas engines for various power classes. Höyrytys represents INNIO Jenbacher products in Finland, particularly as a gas engine supplier, and offers lifecycle maintenance for these engines. Höyrytys also participated in INNIO Jenbacher's annual partner conference in Austria.
• Enico OycoreTechnology or IntegrationEnico Oy, a sister company within WEST Invest Group, is a Tampere-based company specializing in electrical energy management and storage solutions. Höyrytys purchases MobileESS portable energy storage units from Enico for rental to customers. Enico also manufactures the MobileESS energy storage units used by Höyrytys and supplied the three units in Höyrytys's own energy storage fleet. EnicoEMS (Energy Management System) enables remote control and Fingrid reserve market participation.
• Bosch IndustriekesselstrategicTechnology or IntegrationHöyrytys represents Bosch steam and hot water boilers and boiler plant components, which are global leaders in industrial boiler systems with over 140 years of experience. Bosch supplies products only through specialized expert companies, and Höyrytys leverages more than 60 years of energy production expertise as a trusted partner.
• Zander & IngeströmstrategicTechnology or IntegrationHöyrytys represents Zander & Ingeström electric boilers, including low-voltage resistance boilers and high-voltage electrode boilers. Zeta's electric boilers feature fast stepless power adjustment, logic control, and quiet operation, enabling Höyrytys to offer emission-free steam and heat production solutions.
• ClaytoncoreTechnology or IntegrationClayton is the world's leading manufacturer of steam generators with over 90 years of experience. Höyrytys's rapidly movable backup energy fleet has been based on Clayton steam generators since 1959. Clayton generators feature safety, fast start-up/shutdown (5–15 minutes), high efficiency, and minimal installation space requirements.
• Ubitec OystrategicImplementation/ SI/ Consulting PartnerUbitec Oy, a sister company within WEST Invest Group, handles energy storage system installations, testing, and commissioning at customer sites. Ubitec specializes in electrical and mechanical integration of energy storage solutions and is an important partner for scaling installation capacity.
• Sakutek OyminorImplementation/ SI/ Consulting PartnerSakutek Oy, a sister company within WEST Invest Group providing electrical, automation, and maintenance services, merged into Ubitec in September 2024. Sakutek handled electrical design and installations for Auris Energia's electric steam centre project as part of group-level collaboration.
• FingridstrategicOthersFingrid is Finland's electricity transmission system operator. Höyrytys's energy storage units are connected to Fingrid's reserve and regulation electricity markets, generating revenue when storage units are not deployed with direct customers. Höyrytys is a Fingrid-approved market participant.
• LEMENE (Lempäälä Marjamäki microgrid)minorStrategic or Co-development PartnerHöyrytys is delivering six INNIO Jenbacher gas engines as part of Finland's largest renewable energy-based independent electricity grid (microgrid) in Lempäälän Marjamäki. The project involves implementing the gas engine portion of the LEMENE initiative.

Scale indicators8 records

Recent moves6 records

Expansion highlights4 records

Others

• Fortum (district heating services arm): Fortum is both a major Finnish district heating customer of Höyrytys (e.g., 10 MW Espoo backup agreement) and operates its own energy-services business. It is relevant as a customer + adjacent service provider for context on competitive dynamics but is not a direct service peer.

Broad incumbents

• Atlas Copco Power & Flow: Atlas Copco provides mobile compressors, generators, and power solutions to industrial customers across Europe. Its mobile/equipment-rental model and industrial customer base overlap meaningfully with Höyrytys's mobile energy fleet business.
• INNIO Jenbacher (INNIO Group): INNIO Jenbacher manufactures gas engines (10–350+ MW power classes) for natural gas, biogas, and hydrogen — exactly the equipment Höyrytys integrates and services under a 25-year exclusive Finnish partnership. It is comparable as a technology supplier; competitive overlap is partial via direct engine sales to Finnish utilities.
• Caterpillar Energy Solutions (formerly MWM): Caterpillar distributes gas-engine-based distributed power generation systems and aftermarket services in Europe, serving utilities and CHP operators. It competes with INNIO Jenbacher (and thus Höyrytys) in the gas-engine power generation segment with broader geographic reach.
• Viessmann Climate Solutions: Viessmann is a major European heating-systems manufacturer with a strong presence in industrial and district heating solutions, including biomass, gas, and electric heating. It overlaps with Höyrytys on industrial/district heating technology but focuses on installed equipment rather than mobile backup.
• Wärtsilä: Finnish-headquartered global supplier of engine-based power plants and energy storage, including gas engines for district heating and grid balancing. Wärtsilä overlaps with Höyrytys on engine-based CHP for utilities but operates as a manufacturer of large-scale equipment rather than a mobile-rental service.
• Bosch Industriekessel (Bosch Thermotechnology): Bosch Industriekessel is a globally leading industrial boiler manufacturer whose products Höyrytys exclusively represents in Finland. As an upstream supplier it is comparable on product/technology but does not offer Höyrytys's mobile backup-rental service model.
• Alfa Laval: Alfa Laval is a global leader in heat-transfer, separation, and fluid-handling equipment used heavily in district heating and industrial steam systems. It overlaps with Höyrytys on boiler/heat-exchanger technology and serves many of the same Finnish/Nordic utility and process-industry customers.

Direct peers

• Aggreko: Aggreko is the global leader in temporary/mobile power and temperature-control solutions, offering rapidly deployable steam, heat, and electricity plants on a rental/service basis to industrial and utility customers — a near-perfect business-model analogue to Höyrytys's mobile backup-energy fleet.
• Spirax-Sarco Engineering: Spirax-Sarco specializes in steam generation, steam distribution, and process heating solutions for industrial customers worldwide. It competes most directly with Höyrytys on industrial steam expertise and plant services, though primarily through equipment manufacturing rather than mobile backup.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/höyrytys-oy

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 Höyrytys