134 



RELATION OF HEAT TO COMFORT 



FIG. 211 



HOT- WATER 

 HEATING SYSTEM 



FIG. 210 

 WARM-AIR 

 HEATING SYSTEM 



.HOT AIRREGISTE 

 'ft / 



COLD AIR PIPE 



HOT AIR PIPE 



GALVANIZED IRON 

 CASING 



FIRE POT 

 GRATE 



OVERFLOW PIPE 

 EXPANSION TANK 



HOT WATER 

 COLD WATER 



HOT WATER 

 COLD WATER 



COLD WATER 



SHUT OFF VALVE 



SUPPLY PIPE 

 HOT WATER 

 HEATER 



COLO WATER 

 RETURN PIPE 



DRAW-OFF COCK 



PIPES mLEDWITH LIVf STEAM 

 RETURN PIPE CONT/MNINCr WATER 



SHUT OFF VALVE 



LIVl STEAM 

 BOILIN& WATER 

 STEAM HEATER 



FIG. 212 



STEAM HEATING 

 SYSTEM 



