Handbook for architects and builders . PEB-ERIGSSOW ENGINE GO. The OLDEST and LARGEST MAKERS of HOT AIR PUMPS in the WORLD Especially ADAPTEDfor APARTMENTBUILDINGS andCOUNTRY RESI-DENCES. Used EXTENSIVELYfor PUMPING inPRESSURE AIR COMPRESSORNECESSARY where** the ERICSSON HOTAIR PUMP is Ericsson Also make the RKECO ELECTRIC PUMP Write for CATALOGUE () showing REDUCEDFRIGES, to our NEAREST STORE. RIDER - ERICSSON ENGINE CO. 17 W. Kinzie Street, 35 Warren Street, New Yorls 239 Franklin Street, Boston 40 North 7th Street, Philadelphia 234 Craig Street, West, Montrea
Handbook for architects and builders . PEB-ERIGSSOW ENGINE GO. The OLDEST and LARGEST MAKERS of HOT AIR PUMPS in the WORLD Especially ADAPTEDfor APARTMENTBUILDINGS andCOUNTRY RESI-DENCES. Used EXTENSIVELYfor PUMPING inPRESSURE AIR COMPRESSORNECESSARY where** the ERICSSON HOTAIR PUMP is Ericsson Also make the RKECO ELECTRIC PUMP Write for CATALOGUE () showing REDUCEDFRIGES, to our NEAREST STORE. RIDER - ERICSSON ENGINE CO. 17 W. Kinzie Street, 35 Warren Street, New Yorls 239 Franklin Street, Boston 40 North 7th Street, Philadelphia 234 Craig Street, West, Montreal, P. Q. 22 Pitt Street, Sydney, N. S. W. Amargura 96, Havana, Cuba WE ARE THE ORIGINATORSOF THIS TYPE OF DOORS Compound FlushVeneered Doors are practically Sanitary Fire Burglar and Sound Proof Every DoorGuaranteed to beAbsolutely Perfect ,,^ ^ 1 i iH ? ?1 American Compound Door Co. 21st AND MORGAN STREETSPhone Canal 2550 CHICAGO, ILL. 206 HOT-WATER HEATING. Heating by means of hot water has been in universal use for a number of are two principal systems of hot-water heating—the open tank, or low pressure,and the closed tank, or high pressure. In the open-tank system the water can never be hotter than 212° F., while in theclosed tank it may be considerably higher, depending entirely upon the amount ofpressure carried on the system. In determining the size of a boiler required for a hot water job it must be bornein mind that all piping, incl
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