Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 113
IRON SLIXIING DOORCAS/NG Fip. (io. (leneral Arrangement of a Galvanized-Iron Casing and Mixing Damper.Damper between Heater and Register. the position of the damper, the proportions of warm and cold airdelivered to the room can be varied, thus regulating the temperaturewithout diminishing to any… … Fig. fil. Heater and Mixing Damper with Brick Casing. Damper between Heater and Register. The objection to this form of damper is that there is a tendency forthe air to enter the room before it is thoroughly mixed; that is, astream of warm air will rise through one half of the register while 88…
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