Cyclopedia of heating, plumbing and sanitation; a complete reference work . passup through the brick-work, and the ends beprovided with nuts and large washers or plates; or they may be clampedto the iron beams which carry the floor. Where brick casings areused, the heaters are supported upon pieces of pipe or light I-beamsbuilt into the walls. The warm-air space above the heater should never be less than8 inches, while inches is preferable for heaters of large size. Thecold-air space may be an inch or two less; but if there is plenty ofroom, it is good practice to make it the same as the s
Cyclopedia of heating, plumbing and sanitation; a complete reference work . passup through the brick-work, and the ends beprovided with nuts and large washers or plates; or they may be clampedto the iron beams which carry the floor. Where brick casings areused, the heaters are supported upon pieces of pipe or light I-beamsbuilt into the walls. The warm-air space above the heater should never be less than8 inches, while inches is preferable for heaters of large size. Thecold-air space may be an inch or two less; but if there is plenty ofroom, it is good practice to make it the same as the space above. Dampers. The general arrangement of a galvanized-iron casingand mixing damper is shown in Fig. 60. The cold-air duet is broughtalong the basement ceiling from the inlet window, and connectswith the cold-air chamber beneath the heater. The entering air passesup between the sections, and rises through the register above, as shownby the arrows. When the mixing damper is in its lowest position,all air reaching the register must pass through the heater; but if the. Pig. 59. WROT IRON PIPE Method of Hanging a Heater below a Wooden Floor. 87 78 HEATING \M> VENTILATK >N damper is raised to the position shown, pari of the air will pass bywithout going through the heater, and the mixture entering throughthe register will be at a lower temperature than before. By changing rLOOR REG/STER
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