Exhibit 12.1 LENNOX INTERNATIONAL INC. AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (UNAUDITED) <Table> <Caption> FOR THE NINE MONTHS FOR THE YEARS ENDED DECEMBER 31, ENDED -------------------------------------------------------------------- SEPT 30, (In millions, except ratio) 2002 2001 2000 1999 1998 2003 ----------- ----------- ----------- ----------- ----------- ------------ EARNINGS AS DEFINED: Income (loss) before income taxes, cumulative effect of accounting change, minority interest and income or loss from equity investees $ 92.0 $ (44.3) $ 100.6 $ 123.1 $ 88.8 $ 96.9 Fixed charges $ 59.5 $ 69.2 $ 81.7 $ 48.7 $ 30.2 $ 37.1 ----------- ----------- ----------- ----------- ----------- ----------- Earnings as defined $ 151.5 $ 24.9 $ 182.3 $ 171.8 $ 119.0 $ 134.0 ----------- ----------- ----------- ----------- ----------- ----------- FIXED CHARGES AS DEFINED: Interest expense, including amortization of deferred finance charges $ 36.5 $ 45.9 $ 59.3 $ 35.9 $ 20.8 $ 23.6 Portion of rental expense representative of the interest factor $ 23.0 $ 23.3 $ 22.4 $ 12.8 $ 9.4 $ 13.5 ----------- ----------- ----------- ----------- ----------- ----------- Fixed charges as defined $ 59.5 $ 69.2 $ 81.7 $ 48.7 $ 30.2 $ 37.1 ----------- ----------- ----------- ----------- ----------- ----------- RATIO OF EARNINGS TO FIXED CHARGES (1) 2.55 -- 2.23 3.53 3.94 3.61 ----------- ----------- ----------- ----------- ----------- ----------- </Table> (1) Due to restructuring charges in 2001 of $73.2 million (of which $7.8 million was included in cost of goods sold), additional earnings of $44.3 million would have been necessary to cover fixed charges.