What HogforsGST does

HögforsGST Oy is a Finnish manufacturer of heating and cooling systems headquartered in Leppävirta, with regional market entities in Sweden (HögforsGST Sverige) and Norway (HögforsGST Norge) and a newly acquired German subsidiary (Oventrop Energy & Network, Haiger). The company designs, manufactures, and supports district heating and cooling substations (UNIS wall-mounted series, GST floor-standing series), hybrid heating systems (HybridHEAT, HybridREADY) that combine district heating with heat pumps and other sources, smart substations (FiksuGST) with remote monitoring, and supporting components including the proprietary Mid-Cooling Connection (MCC), MIX shunt groups, AirVec/DirtVec/AirDirtVec separators, side stream filters (PartiVec), heat recovery units, and fourth-generation district heating (4GDH) solutions. All hardware is manufactured in-house in Finland, and the Fiksu control platform supports BACnet/IP, Modbus TCP, and MagiCAD BIM integration.

The business model combines hardware sales (the dominant revenue stream at ~EUR 33M annual turnover, majority from export), subscription/recurring revenue from Fiksu remote monitoring and optimization services, and professional services spanning technical support, design consulting, and spare parts distribution. Go-to-market is sales-led with regional sales managers covering defined territories across Finland, Sweden, and Norway, supported by a contractor/install channel and a small e-commerce webshop for spares; the 2025 Oventrop acquisition adds a German channel. Customers include property managers, housing associations, HVAC contractors, designers/consultants, and energy companies serving apartment buildings, public buildings, industrial and commercial properties, and small houses. The company is privately held, with Intera Partners as the controlling private equity owner and Oventrop Group as a minority shareholder following the 2025 transaction.

Name

HogforsGST

Legal name

HögforsGST Oy

Website

https://hogforsgst.com

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

51–100 employees

Short description

HögforsGST is a Finnish manufacturer of district heating and cooling substations, hybrid heating systems, and the Fiksu smart control platform. It serves property managers, contractors, designers, and energy companies across the Nordic region and Germany.

Ownership category

akta.pro rank

Product category

District Heating Equipment Manufacturing

NAICS

Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

HVAC Equipment (Heating, Cooling & Air Handling) (IMAHAKAB)

akta.pro secondary industries

Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF), Chillers, Boilers & Central Plant Operations (BPABACAG), Chillers & Cooling Plant Equipment (IMAHAKAE)

Keywords

• District heating substations
• Hybrid heating systems
• Smart control systems
• District cooling products
• Heating equipment manufacturing

Headquarters

HQ city

Leppävirta

HQ country

Finland

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Heating and Cooling Equipment Sales: Sale of district heating substations, hybrid heating systems, mixing units, air and dirt separators, and district cooling products. Products are manufactured in-house in Finland to ensure quality standards.
2. Smart Control System Services: Fiksu smart control system services including remote monitoring, optimization, system reviews, reporting, alerts, and remote updates for heating systems
3. Technical Support and Service: After-sales technical support, warranty claims handling, spare parts sales, and maintenance consulting services
4. Design and Consulting Services: System and equipment design, connection diagrams, modeling, and operational reports for designers and consultants

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

HögforsGST designs and manufactures district heating and cooling substations, hybrid heating systems (HybridHEAT), mixing units, air and dirt separators, and the Fiksu smart control system, all produced in-house at its Leppävirta, Finland factory. The company sells these energy solutions to property managers, HVAC contractors, designers, and energy companies across the Nordics and Central Europe.

Product overview

HögforsGST is a Finnish company specializing in the manufacture of high-quality heating and cooling systems. The product portfolio centers on district heating and hybrid heating solutions, comprising several product lines: the UNIS series (wall-mounted substations for small to large buildings), GST series (floor-standing substations), and FiksuGST (smart substations with advanced control). The HybridHEAT system integrates district heating with heat pump technology and intelligent Fiksu control for optimized multi-source heating. Supporting products include MIX shunt groups, AirVec/DirtVec/PartiVec separators, MCC (Mid-Cooling Connection) for improved efficiency, and district cooling products. All products are manufactured in Finland (Leppävirta) and supported by the Fiksu Control System platform for remote monitoring and optimization. The company also acquired Oventrop Energy & Network in 2025 to expand into the German market.

Differentiator

Problem solved

Functional benefit

Brands

• HybridHEAT: Hybrid heating product line combining district heating with heat pump technology and smart control systems for optimized energy use.
• FiksuGST
• Fiksu Control System
• UNIS
• GST
• MCC (Mid-Cooling Connection)

Products and services

• HybridHEAT Hybrid heating system that combines district heating, heat pump technology, geothermal, exhaust air heat recovery, and solar energy, with Fiksu intelligent control that optimizes source selection based on real-time electricity costs. Targets property managers, housing associations, and industrial property owners from town houses to large industrial complexes.
• UNIS 100-200 Series Wall-Mounted District Heating Substations Wall-mounted district heating substations for apartment buildings, with capacities up to 80 kW DHW and 75 kW heating. Feature stainless steel pipes, flexible connections, BACnet/IP and Modbus TCP support, and MagiCAD availability for BIM/CAD planning.
• UNIS 300 Series Wall-Mounted District Heating Substations Wall-mounted district heating substations for connecting apartment buildings to district heating systems. Suitable for new buildings and renovations, for radiator, floor heating, and air heating. Two-circuit models generate DHW and water for the heating circuit.
• GST Floor-Standing District Heating Substations Floor-standing district heating substations manufactured in Finland with high technical quality, energy efficiency, easy handling, and clear installation properties. Available in single, double, or triple circuit configurations.
• FiksuGST Smart District Heating Substations Smart district heating substation equipped with the Fiksu intelligent control system, enabling remote monitoring, energy optimization based on weather and consumption, power limitation, and integration with building automation protocols (BACnet/IP, Modbus TCP) and the CLOUDigo cloud platform.
• HybridREADY Fourth Generation District Heating Substations Fourth generation district heating substation equipped with the Fiksu control system and designed to connect additional heat sources to the property's heating system. Supports lower network temperatures and integration of renewable heat sources.
• District Cooling Products (Fjärrkyla) District cooling substations and heat exchangers for commercial and residential buildings requiring cooling, including the award-winning installation at YLE and combined heating/cooling configurations like the GST MIX C/H shunt group.
• MCC (Mid-Cooling Connection) Technology Internal connection in district heating substations that improves Delta T and energy efficiency by using district heating water in three stages (DHW heat exchanger, heating circuit, DHW reheating) before returning to the network. Can reduce return temperature by up to 15 degrees and improve district heating network efficiency by approximately 15%.
• MIX Shunt Groups (Mixing Units) Mixing units (shunt groups) for controlling and distributing heating water in district heating systems, including the GST MIX C/H combined heat/cool variant.
• Air and Dirt Separators (AirVec, DirtVec, AirDirtVec, PartiVec) Air separators (AirVec), dirt separators (DirtVec), combined air and dirt separators (AirDirtVec), and side stream filters (PartiVec) for protecting heating system equipment and maintaining efficiency.
• Fiksu Control System Intelligent control system for HögforsGST heating and cooling products that enables remote monitoring, energy optimization, automated adjustments based on weather and consumption, alerts, reporting, and remote updates. Available through the Fiksu Support service and integrates with BACnet/IP, Modbus TCP, and CLOUDigo.
• Heat Recovery Unit (LTO-yksikkö) Heat recovery unit that captures and reuses waste heat from ventilation systems, forming part of the HybridHEAT system for maximizing energy efficiency.
• Spare Parts and After-Sales Service Comprehensive spare parts range and after-sales service for HögforsGST heating systems, available through the service department and the Fiksu webshop.

Quantifiable outcome

• Up to 45% savings on district heating costs with hybrid heating
• +5 more outcomes

Named customers8 records

Segments8 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature6 records

Partnerships

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

• Oventrop Energy & Network (Oventrop)coreStrategic or Co-development Partner · 1 August 2025HögforsGST acquired Oventrop's German subsidiary Oventrop Energy & Network (formerly Kring Fernwärme) as part of strategic expansion into Central Europe. The acquired company has annual revenue of approximately 10 million EUR and 45 employees. Oventrop becomes a minority shareholder in HögforsGST as part of the deal. The partnership enables product sales from Finland to the German market and strengthens product offerings in Nordic markets through component and product development collaboration.
• SWEPminorStrategic or Co-development Partner · 1 January 2025HögforsGST acquired SWEP's district heating substation business in Sweden and Norway, expanding its market presence in these countries.
• BithousestrategicTechnology or Integration · 1 January 2024HögforsGST made an investment in Bithouse, a hardware and software development company based in Tampere, Finland. The investment deepens an existing partnership focused on development of HögforsGST's Fiksu smart control system. Bithouse specializes in BACnet, Modbus, and M-Bus software and hardware development for building and industrial automation.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Danfoss: Danish multinational with a strong District Energy / Heating segment making heating controls, heat exchangers, and substation solutions for district heating networks globally. Direct overlap with HögforsGST in district heating substations, smart controls, and energy company customers across Europe.
• Alfa Laval: Swedish global leader in heat exchangers, including brazed plate and district heating/cooling applications. Closely comparable technology stack (heat exchangers and thermal efficiency) and overlapping Nordic and European customer base in district energy and HVAC.
• Viessmann: German family-owned heating systems manufacturer covering boilers, heat pumps, and district heating interfaces. Comparable product breadth in building heating, complementary German market presence now accessed by HögforsGST via the Oventrop acquisition.
• Uponor: Finnish-headquartered building solutions company providing heating, cooling, and plumbing systems for residential and commercial buildings. Directly comparable Finnish/Nordic heritage and overlapping customer base of property managers, contractors, and designers.
• SWEP (Dover Corporation): Swedish-origin brazed plate heat exchanger manufacturer (now part of Dover) supplying HVAC and district heating applications globally. Closely comparable in core heat exchanger technology; the predecessor of HögforsGST's 2024 Swedish/Norwegian substation acquisition.
• Kelvion: German-based heat exchanger manufacturer (formerly GEA Heat Exchangers) producing plate, brazed, and shell-and-tube exchangers for HVAC, district heating, and industrial applications. Directly comparable technology stack serving similar European district energy and HVAC customers.

Broad incumbents

• Bosch Thermotechnology: Division of Bosch offering residential and commercial heating systems, including heat pumps and boilers, across Europe. Overlaps in heating systems and German/European distribution, but operates as a broad incumbent rather than a district heating specialist.
• REHAU (Building Solutions): German building solutions provider offering heating, plumbing, and infrastructure systems, including district heating pipe networks. Comparable in serving building and infrastructure customers, though broader portfolio than HögforsGST's focused substation offering.

Regional players

• ENWA: Norwegian specialist in water treatment and district heating/cooling solutions with deep Nordic installer relationships. Comparable substation-adjacent offering but primarily Norwegian-focused, making it a regional rather than direct pan-European competitor.

Others

• Wilo: German global pump manufacturer serving HVAC, heating, and district energy applications. Adjacent rather than directly competing, but pumps are a critical component in district heating substations and HögforsGST customers frequently specify Wilo equipment.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCkZPydy9f4UIr4cseJBEDdQ
• Facebookfacebook.com/HogforsGST
• LinkedInlinkedin.com/company/hogforsgst

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries3 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 HogforsGST