Heating Calculations  
      R Value  
  Wall R Value
  Ceiling R Value
  Floor R Value
  Structure Length (ft)    
  Structure Width (ft)    
  Wall Height (ft)  
  Peak Height (ft)  
  Ambient Temperature (F)    
  Ground Temperature (F)    
  Desired Internal Temperature (F)    
  Number of People    
Wattage of Lighting (W)
  Wall Calculations Required BTU's  
  Ceiling Calculations Required BTU's  
  Floor Load Required BTU's  
  Additional Load Calculations Required BTU's  
    Total BTU's  
    Required kW of Heat
  This formula assumes return air. If return air is not used kW required must be doubled.