Ilmarine has been involved in the manufacturing of equipment for the energy sector since 1952. After the metalworking factory was put under the Soviet Ministry of Heavy Industries, the company specialised in the manufacturing of auxiliary devices for power station boilers. Mostly semi-mechanic furnaces and electro-mechanic automated devices for furnaces were manufactured.

Today, Ilmarine continues to produce boiler constructions such as walls, supports, and foundations. Another major development is an industrial air cleaning systems.