Arizona weekly journal-miner., 1903-01-28
HEATING FURNACE
The Heating and Plumbing Ar arrangements of the New
 School Building.
Everything Will Be of the Latest and Most Approved Designs and
 Best of Work.

The heating plant of the new school
 building will be furnished by the B. F. Sturtevant Co.,, of Boston. The plan of the heating apparatus is what
 is known as the indirect steam fan system. Cold air is taken in from the
 outside near the first floor line; is carried downward to the basement,
 where it passes over numerous steam coils where it is heated to the desired temperature. The air thus heated, is passed upward to the various rooms of
 the building by means of a large cir cular fan, six feet in diameter, which
 is kept rapidly rotating by small steam engine which is part of the
 heating system. Brick flues are pro- vided so that each room has one fiue which shall conduct thereto the warm pure air, and another flue which shall carry away the used and foul air. The warm air inlet is placed near the ceiling line and the foul air exit underneath at the floor line. The movement of air in and out of each room is such that each room will
 be supplied every six or seven min utes with its own volume of fresh warm air The same amount of inn pure air therefore will be carried out. This arrangement guarantees that the pupils will not breathe over the same air again and again as IS the case when rooms are heated by stoves.
 The temperature regulation is auto matic. Each room is provided with what is called thermostat, which is in appearance somewhat like ther- mometer. It can be set for any desired temperature. If for example, 70 degrees is required, the thermostat can be so adjusted, and is so accurate in its op- eration, that the temperature of the room will be m ntained without any attention on the part of the teacher with not more than one degree of var iation in either direction; that is, the will not fall below 69 de- | grees or rise above 7l degrees. This | is explained on the principle of ex- pansion and contraction. When a room becomes too warm, metallic | parts of the thermostat expand and | open the dampers which supply the | cold air. When the room becomes | cool. contraction causes the warm air | dampers to open wider.
 This heating plant is believed. by the | board of trustees, to be the most per feet and sanitary system that can be obtained.
 The plumbing fixtures will be sup piled by the J. L. Mott Iron works of New York City, one of the oldest and best known plumbing houses in the United States.
 The northwest basement room becomes the boys toilet room of the building, | and will be divided so as to contain drinking fountains, lavatOries, and | twelve closets in range form.
 The south basement room will | be the girls toilet room and will likewise be provided with lavatories, fountains. and twenty clos cts in range form. Both of these toilet rooms will have concrete floors.
 The first floor of the building will be provided with two crystal ! drinking fountains, and i'm proved sanitary form much used in New York City schools. Also on this floor one individual closet will be supplied in connection with the offices and one in connection with the li brary room. The fixtures on the sec ond floor. with the omission of one closet. will be the same as on the first floor. Two fire plugs and two hose reels, for fire emergencies, will be placed on each floor of the building, including the basement. All this material is of the best quality and has been purchased by the board of trustees at wholesale prices through Brown Bros. of this city. 1t was shipped from New York City on the Sth inst, and will no doubt soon be installed, as the 'roughing in'' for this plumbing work is already practically com pleted.
 The aim of the board of trustees, in regard to both the heating and plumb ing apparatus, has been to furnish the most sanitary and substantial material possible. and they believe this appar- itus will be thoroughly acceptable to the public.
 The building has been completely wired for electric lights, and also Diped for gas.