<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF SERVICE EXPERTS, INC. FOR THE SIX MONTHS ENDED JUNE 30,
1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                          19,286
<SECURITIES>                                         0
<RECEIVABLES>                                   30,225
<ALLOWANCES>                                     1,170
<INVENTORY>                                      8,824
<CURRENT-ASSETS>                                62,961
<PP&E>                                          27,332
<DEPRECIATION>                                   8,046
<TOTAL-ASSETS>                                 153,892
<CURRENT-LIABILITIES>                           32,908
<BONDS>                                          4,751
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           149
<OTHER-SE>                                     115,493
<TOTAL-LIABILITY-AND-EQUITY>                   153,892
<SALES>                                        107,197
<TOTAL-REVENUES>                               107,197
<CGS>                                           70,775
<TOTAL-COSTS>                                   70,775
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 448
<INCOME-PRETAX>                                 11,103
<INCOME-TAX>                                     4,031
<INCOME-CONTINUING>                              7,072
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     7,072
<EPS-PRIMARY>                                     0.50
<EPS-DILUTED>                                     0.50