EXHIBIT 12.1 LENNOX INTERNATIONAL INC. AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (UNAUDITED) <Table> <Caption> FOR THE THREE MONTHS ENDED FOR THE YEARS ENDED DECEMBER 31, MARCH 31, -------------------------------------------------------------- ------------- (In thousands, 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 $ 91,998 $ (44,271) $ 100,576 $ 123,138 $ 88,817 $ 2,504 Fixed charges 59,490 69,188 81,772 48,688 30,225 11,964 ---------- ---------- ---------- ---------- --------- ---------- Earnings as defined $ 151,488 $ 24,917 $ 182,348 $ 171,826 $ 119,042 $ 14,468 ---------- ---------- ---------- ---------- --------- ---------- FIXED CHARGES AS DEFINED: Interest expense, including amortization of deferred finance charges $ 36,480 $ 45,888 $ 59,339 $ 35,888 $ 20,825 $ 7,466 Portion of rental expense representative of the interest factor 23,010 23,300 22,433 12,800 9,400 4,498 ---------- ---------- ---------- ---------- --------- ---------- Fixed charges as defined $ 59,490 $ 69,188 $ 81,772 $ 48,688 $ 30,225 $ 11,964 ---------- ---------- ---------- ---------- --------- ---------- RATIO OF EARNINGS TO FIXED CHARGES(1) 2.55 -- 2.23 3.53 3.94 1.21 ---------- ---------- ---------- ---------- --------- ---------- </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.