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                                                                      EXHIBIT 11

                              SERVICE EXPERTS, INC.

                       COMPUTATION OF EARNINGS PER SHARE



                                 Three Months Ended        Nine Months Ended
                                    September 30,            September 30,
                                  1996         1997        1996         1997
                                 ------      -------      ------      -------
                                    (Unaudited)               (Unaudited)
                                    (In thousands, except per share data)
                                                             
Net income                      $1,628      $ 4,749      $2,295      $11,515
Average shares outstanding       5,530       14,759       3,265       14,005
Net effect of dilutive
  stock options based
  on the treasury stock
  method using average
  market price                      --          173          --          147
                                ------      -------      ------      -------
Weighted average shares          5,530       14,932       3,265       14,152
                                ------      -------      ------      -------
Net income per common
  share                         $ 0.29      $  0.32      $ 0.71      $  0.81
                                ======      =======      ======      =======



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