Miura boilers go from zero pressure to operating pressure in five minutes. Miura boilers are ultracompact and take up a fraction of the space of firetube boilers. They are easy to retrofit into existing facilities because they can enter through standard commercial, factory and institution portals, eliminating costly structural changes. Because they don't have to remain on-line all the time, energy (cost) savings are impressive. Additional savings are realized by operating a bank of Miuras as opposed to one or two. They automatically turn on and off as needed, operating at optimum efficiency. Miura.