Heatmasters is an international industrial services and equipment provider specializing in heat treatment, NDT -inspection, surface treatment, and other services for maintenance of process plants and manufacturing industry.

Wizards of Metal

Our personnel are not called the “wizards of metal” for nothing. In-depth heat treatment know-how accumulated during the last half a century, customer orientation, and our capability to adapt to industry needs has forged us into pioneers in heat treatment solutions and industrial services.

Panostaja Group

At Heatmasters, we are honored to be part of the publicly listed Panostaja Group. Panostaja Oyj has been an active shareholder since 2007, with a long history in Finnish capital investment and cooperation with Finnish companies and owners.


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Heatmasters’ long history is a saga of accumulated know-how, innovation and expertise.

2020 - 2017

Major equipment & services project completed in South Korea.

HeatmastersPoland celebrates 25 years of heat treatment operations.

Heatmasters celebrated 45th anniversary.

Kymijärvi III bio-heating plant produces first heat for Lahti’s district heating network. Heatmasters wizards were on-site prior to commissioning, providing heat treatment services during an 18-month time period.

Occupational health and safety management standards updated with new ISO 45001:2018 certification.

Introduced new HM25 Temperature Control System software.

Poland’s Service Center moved to an improved facility in Będzin, next to previous location.

Zero occupational accidents in Finland during 2018.

Introduced a portable induction machine HM35 INU.

2016 - 2000


Establishing Heatmasters Turku, to focus on heat treatment service.

Heatmasters headquarters moved to a new, modern facility in Hollola, Finland.

OHSAS 18001 health and safety management system certified. Heatmasters achieved 0 injuries (causing more than one day of absence) during 2016.

Delivery of history’s largest electrical furnace to end-user in Kazakhstan.

Heatmasters Poland completes the first refractory drying project.

Operations were divided into two divisions: Services and Technology.

Mr. Ilkka Mujunen started as President and CEO of Heatmasters.


Heatmasters Poland moves to a new, modern facility in Będzin with 7 modern heat treatment furnaces.

Investment company Panostaja Oyj acquired the ownership of Lahden Lämpökäsittely Oy and the group name was changed to Heatmasters Group.

ISO9001 quality system was certified for the first time.

First orders from China. Developing local dealership.

Joint venture Heatmasters Baltic Oü was established in Estonia.

1999 - 1974

Headquarters moved to new premises in Koneharju, Lahti, Finland.

Establishing Heatmasters Oy to focus on products and technology.

Large subcontracting agreement with Fakop Ltd. in Poland.

Acquisition of Göteborgs Värmebehandling in Gothenburg, Sweden.

Company acquired the heat treatment business in A. Ahlström Oy’s boiler plant in Varkaus, Finland.

Founder Eero Jääskeläinen tragically died in the middle of a negotiation. His brother Jorma took over the lead.

Own development, 6-channel transformer with micro-processor controller was introduced.

Oy Lämpökäsittely Ab was established in Finland by Mr. Eero Jääskeläinen. Eero and his brothers gained their heat treatment knowledge from Svenska Cooperheat Ab in Gothenburg, Sweden.

The Company was the first professional heat treatment company in Finland.