Cold Weather Catalog - Chromalox Precision Heat and Control

Technical InformationGeneral Industrial Sizing GuideTechnicalCHROMALOXGeneral Industrial Sizing GuideHeat Loss Calculation- IndoorJob Name:Location:Bid Number:Date:Room:Reference:Voltage: V Phase:Room SizeLength: ft. Width: ft. Ceiling Height: ft.Total Square Footage:square feetHeater Mounting Height:ft.Design InformationCeiling R-Factor: Outside Design Temperature: FWall R-Factor: Desired Inside Temperature: FTemperature Rise: FAir Changes Per Hour: cubic foot per hourCalculationItem Area sq-ft X U-Factor = BTU/Hr/Degree FWindows sq-ft X =Doors sq-ft X =Net Wall sq-ft X =Roof sq-ft X =Floor Perimeter * ft X =Item A TOTAL = BTU/Hr/degree F* For floor perimeter use U-factor of 1.2, 0.7, or 0.6 for exposed, 1" insulation, or 2" insulation respectivelyAir Change LossCubic foot per hour X 0.019 BTU/cubic ft. = BTU/hr/degree FItem B cubic ft./hr X 0.019 BTU/cubic ft. =TOTAL Item A + Item B = BTU/Hr/degree FItem C Convert to Watts = Total / 3.412 = Watts/Hr/degree FTOTAL HEATING REQUIREMENTItem C x Temperature Rise = Watts/HrWatts/Hr/degree F X degree F =Total Watts/Hr.Heat Loss Calculation Form for General Industrial Applications180