chaudière à vapeur à base humide

CONT: The [cast-iron] boiler may be dry base (the firebox is beneath the fluid-backed sections), wet leg (the firebox top and sides are enclosed by fluid-backed sections), or wet base (the firebox is surrounded by fluid-backed sections, except for necessary openings). ... The wet base design is easiest to adapt for combustible floor installations (applicable codes usually demand a floor temperature under the boiler no higher than 32°C (90 F), plus room temperature. A wet base steam boiler at 102°C (215 F) or water boiler at 116°C (240 F) cannot meet this requirement without floor insulation). ... As with cast-iron boilers, dry base, wet leg, or wet base design may be used [for steel boilers].