Apr 13, 2010. /Lesprom Network/. Mäntän Energia, an energy company owned 45% by Metsä Tissue, is investing Euro 3.1 million in a 50 megawatt reserve boiler this spring, company said in a statement received by Lesprom Network. The boiler will be transferred from M-real’s Lielahti mill to replace Mäntän Energia’s idle coal-burning reserve boiler. This replacement will ensure safe and undisturbed supply of heat and electricity to Metsä Tissue’s Mänttä mill, which consumes approximately 84% of the heat and 100% of the energy produced annually by Mäntän Energia. Work to transfer the boiler from Lielahti to Mänttä will begin in April. The system should be in place in October.