Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 120
this case. Fig. 65 shows an arrange-ment for this purpose. When the damper is in the position shown,air will be taken from the room above and be warmed over and over;but, by raising the damper, the supply will be taken from outside.Special care should be taken to make all mixing dampers tight… … Fig. 65. Arrangement for Quick Heating witbout Ventilation. Damper Shuts off FreshAir, and Air of Room Heated by Rotating Forth and Back through Register and Heater. guide-pulleys; special attachments should be provided for holdingin any desired position. Warm=Air Flues. The required size of the…
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