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 Hatco  |  Description  | Model   | OEM #   | 
   |   | 
    
 
    | Heating  Element Booster A = 9-1/2",  2-1⁄2" Square Flange  w/Gasket 
   |  Compact (39KW),   Imperial/Powermite  (58.5KW Before   S/N 0000-FL01  | R02.04.650.00  R02-04-650
   | 
   | 
    
 
    | Heating  Element Booster A = 9-1/2",  2-1⁄2" Square Flange  w/Gasket 
   | Compact (39KW),   Imperial/Powermite  (58.5KW Before   S/N 0000-FL01 
   | R02.04.731.00  R02.04.720.00
   | 
   | 
    
 
 
 
  | Heating  Element Booster A = 9-1/2",  2-1⁄2" Square Flange  w/Gasket 
   | Compact  (58.5KW) 
   | R02.04.721.00  R02.04.733
   | 
   | 
    
 
 
 
  | Heating  Element Booster A = 9-1/2",  2-1⁄2" Square Flange  w/Gasket  | Compact  (58.5KW) 
   | R02.04.735.00 R02.04.724.00
   | 
   | 
    
 
    |  Heating  Element Booster A = 8-1/4",  2-1⁄2"Square Flange  w/Gasket  | Series:  3CS 
   | R02.06.303.00 
   | 
   | 
   
    | Heating   Element  Booster  A = 8-1/4",   2-1⁄2"Square Flange   w/Gasket  |  Series:   3CS   | R02.06.452.00 
   | 
   | 
   
 
 
  | Heating   Element  Booster  A = 11-1/2",   2-1⁄2"Square Flange   w/Gasket 
   |  Compact  (4, 24KW; 12KW, 3-Phase only),   Heavy Duty  (12KW, 3-Phase only),  R02-04-400 Imperial/Powermite  (24KW; 12KW, 3-Phase only)   
   | R02.04.404.00 
   | 
   | 
   
    | Heating    Element   Booster   A = 11-1/2",    2-1⁄2"Square Flange    w/Gasket   | Compact  (9,13.5,27KW),  Heavy-Duty  27,40.5KW),   Imperial/Powermite  (9,13.5,27,40.5KW)   
   | R02.04.453.00 
   | 
   | 
   
    | Heating     Element    Booster    A = 13-1/4",     2-1⁄2"Square Flange     w/Gasket  
   | Compact (17KW) |  R02.04.600.00  | 
   | 
   
    | Heating     Element    Booster    A = 15",     2-1⁄2"Square Flange     w/Gasket  
   |  Compact (39KW),    Imperial/Powermite   (58.5KW Before    S/N 0000-FL01 
   |  R02.04.653.00  | 
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 Hatco  |  Description  | Model   | OEM #   | 
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