UAB Mažeikių Šilumos Tinklai (Mažeikiai Heating Networks) seeking to maintain one of the lowest and most stable heat prices for consumers and not to increase the amount of imported natural gas, in 2014, in Mažeikiai District Boiler House (DBH) plans to install new, effective and modern boilers using the same fuel instead of old biofuel boilers taken out of service (biofuel steam boiler No 4 DE 25-14 and water heating boiler No 7 DE 25-14). New biofuel boilers would be constructed on the site of the dismantled boilers. The planned total output of new biofuel boilers will be 20 MW (2 units of 10 MW). The influence of the new investment on the cost of heat in Mazeikiai town is evaluated in the feasibility study.