Modular Power Boilers Building Information: Boilers are placed on top of Heaters and will turn Water into High Pressure Steam. There are currently 2 variants of boilers, Mk1 & Mk2. Building Cost: Boiler MK1: 20 Copper Sheet 12 Reinforced Iron Plate 4 Modular Frame Boiler MK2: 100 Copper Sheet 20 Reinforced Iron Plate 4 Heavy Modular Frame Building Usage Rates: Tier Default Water Consume Steam at 500℃ Steam at 750℃ Steam at 1050℃ 1 40 60 70 80 2 80 120 140 160