Heating Helper

CHAPTER 5INSTALLED RADIATION: DETERMINING HEAT LOADSTEEL PIPE COILS - Sq Ft of Radiating Surface Per Linear Ft of CoilNominalPipe Size(inches)11-1/41-1/22Number of Rows of Pipe in Coil1 2 3 4 5 6 8 10.57.71.81.951.091.361.551.811.531.912.182.551.902.372.703.172.202.743.123.662.443.043.464.052.833.524.024.71Notes: 1. Based on 70°F room temperature.2. Pipes are positioned level, on vertical wall.3. For coils positioned along floor or ceiling.. . Multiply chart value for 1 row of pipe x no. of rows of pipe.3.143.904.455.22CORRECTION FACTORS IF ROOM TEMPERATURE IS OTHERTHAN 70°F DIVIDE SQ. FT. OF RADIATION BYRoomTemp.80° 75° 70° 65° 60° 55° 50°Design orAverage WaterTemperature110°120°130°140°150°160°170°175°Heat Emissions for Cast Iron RadiatorsHeat EmissionRatesBtuh per Sq. Ft.30507090110130150160Design orAverage WaterTemperature180°185°190°195°200°205°210°215°Heat EmissionRatesBtuh per Sq. Ft.17018019020021022023024071