F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
F22B21/341—Vertical radiation boilers with combustion in the lower part
Dispositif de regulation, de securite et de fonctionnement optimum adaptable aux recuperateurs de calories dans les rejets thermiques d'appareils domestiques ou industriels engendrant de tels rejets