Base for appropriate boiler selection is a thermal balance of the heated area created according to thermal standards for buildings. The nominal thermal efficiency should equal or be little higher (about 10%) than calculated heat requirement of the heated area. In chart nr 6, No. 2 are information about size of areas that can be heated by KTM boilers. Given data is approximate and is specified for rooms of 3 m height.
Recommended fuel for KTM boilers is: Fine coal MI sort, 25/9 class according to PN-82/G-97001