Mechanical Contracting & Plumbing January-December 1909 . vanized iron exhaustflues for removing the foul air from thefour new class rooms, and the twoclass rooms which are on the sec- ond floor of the old flues shall be made of U. S. gauge galvanized iron, andshall extend from the floor of the schoolrooms to a point six inches above the at-tic floor. In the old building is a vent flue whichmay be utilized to vent two rooms on thefirst floor, if it is found practical to placea partition in it for its full length; other-wise, it will serve only one room, and aseparate flue
Mechanical Contracting & Plumbing January-December 1909 . vanized iron exhaustflues for removing the foul air from thefour new class rooms, and the twoclass rooms which are on the sec- ond floor of the old flues shall be made of U. S. gauge galvanized iron, andshall extend from the floor of the schoolrooms to a point six inches above the at-tic floor. In the old building is a vent flue whichmay be utilized to vent two rooms on thefirst floor, if it is found practical to placea partition in it for its full length; other-wise, it will serve only one room, and aseparate flue should be provided for theother room. Ducts marked HI are hotair ducts leading to the first storey, andthose marked H2 lead to the secondstorey. Vent flues are designated byVb, VI and V2, according to whetherthey take their air from the basement,first or second storey. Vent registersare located just above the baseboard,while the vents from the toilet rooms arenear the ceiling. Each hot air duct for the first storeydischarges the air eight feet above the. — ^»7Feed Fig. 6.—Side Elevation of Boiler. floor, and there the duct stops, but in itsplace or position in the second storey avent flue, the same size commences andextends to the attic. As no plan for thesecond storey is furnished, the vents forthe second storey are not shown. Allother ducts are shown. Air Diffusers. Instead of wire screens for coveringthe warm air inlet, use air diffusers withvanes so the currents of air can be di-rected to any part of the room. Foul Air Outlets. The openings for the escape of foulair are to be covered with a register face,wire screen being preferable. Back ofthe screen, place a deflector plate oper-ated with a rod so that in warming therooms in the morning the foul air ductsmay be closed by pulling out the this is done and the fan is startedthe air in each room will pass throughthe open door down the stairway to thefan, and be recirculated until each roomhas attained the desire
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