Exhibit 99.1

Lennox International Reports Fourth Quarter and Full Year 2012 Results

DALLAS, February 5, 2013 – Lennox International Inc. (NYSE: LII) today reported fourth quarter and full year 2012 results. Financial results presented have been adjusted for discontinued operations related to the company’s previously announced plans to divest the Service Experts business.

For the fourth quarter, revenue was $685 million, up 6% from the prior-year quarter. Total segment profit margin was 6.2% compared to 7.0% in the prior-year quarter. Diluted earnings per share from continuing operations on an adjusted basis was $0.56 compared to $0.55 in the prior-year quarter. Diluted earnings per share from continuing operations on a GAAP basis was $0.52 compared to $0.56 in the fourth quarter a year ago.

For the full year, revenue was $2.9 billion, up 4% from the prior year. At constant currency, revenue was up 5%. Total segment profit margin was 7.6% compared to 7.0% in the prior year. Diluted earnings per share from continuing operations on an adjusted basis was $2.70, up 20% from $2.25 in 2011. Diluted earnings per share from continuing operations on a GAAP basis was $2.63, up 26% from $2.09 in the prior year.

“The company’s performance in 2012 was led by our Residential business, which significantly outperformed the market on gains in replacement business and strong growth in new construction,” said Chairman & CEO Todd Bluedorn. “Residential revenue was up 9% with profit up 17% for the year. In the face of flat commercial markets in 2012, our Refrigeration and Commercial businesses had strong operational performance. Refrigeration revenue was flat at constant currency with profit up 6%. Commercial revenue was up 3% at constant currency with profit up 14%. For the company overall, free cash flow was strong for the year at 190% of GAAP net income. The company paid $48 million in dividends and repurchased $50 million of stock in 2012.

“In the fourth quarter, momentum continued with revenue growth and strong operational performance across all our businesses. Margins were impacted by higher incentive compensation, as planned and previously discussed, as performance targets were achieved or exceeded in 2012, compared to 2011 when incentive compensation was significantly lower. Residential revenue was up 9% and Refrigeration revenue was up 2% in the quarter at constant currency, with margins down on the higher incentive compensation. Residential margin was also impacted by lower mix and a step-up in the quarter for strategic investments in distribution expansion. In Commercial, revenue was up 5% at constant currency, primarily on the strength of non-national account business, and margin expanded 220 basis points to 13.5% to drive Commercial profit up 25%.

“Looking ahead at 2013 overall, we reiterate our guidance for revenue growth of 2-6% and EPS from continuing operations of $3.15-$3.55. The company is competitively well-positioned for continued market outperformance for the year. With our solid balance sheet and strong cash generation, we will continue to invest in the business and maintain a competitive dividend, and we plan to repurchase $100 million of stock in 2013.”

FOURTH QUARTER 2012 FINANCIAL HIGHLIGHTS

Revenue: Revenue for the fourth quarter was $685 million, up 6% from the prior-year quarter. Foreign exchange was neutral to revenue. Volume and price/mix were up from the fourth quarter a year ago.

Gross Profit: Gross profit in the fourth quarter was $168 million, up 10% from $153 million in the prior-year quarter. Gross margin was 24.6%, up 90 basis points from 23.7% in the fourth quarter a year ago. Gross profit was positively impacted by higher volume, favorable price/mix, and lower material costs, with a partial offset from strategic investments in distribution.

Income from Continuing Operations: For the fourth quarter, adjusted income from continuing operations was $29 million, or $0.56 diluted earnings per share, compared to $29 million, or $0.55 diluted earnings per share from continuing operations in the prior-year quarter. On a GAAP basis, fourth quarter 2012 income from continuing operations was $27 million, or $0.52 diluted earnings per share, compared to $29 million, or $0.56 diluted earnings per share from continuing operations in the prior-year quarter.

Adjusted income from continuing operations for the fourth quarter of 2012 excludes net after-tax charges of $2.0 million, which are derived from:

FULL YEAR 2012 FINANCIAL HIGHLIGHTS

Revenue: For the full year, revenue was $2.9 billion, up 4%. At constant currency, revenue was up 5%. Volume was up, and price/mix was flat for the full year.

Gross Profit: Gross profit for the full year was $722 million, up 8% from $670 million in the prior year. Gross margin was 24.5%, up 90 basis points from 23.6% in the prior year. Gross profit was positively impacted by higher volume and lower material costs, with a partial offset from strategic investments in distribution.

Income from Continuing Operations: Adjusted income from continuing operations for 2012 was $139 million, or $2.70 diluted earnings per share, compared to $120 million, or $2.25 diluted earnings per share from continuing operations in the prior year. On a GAAP basis, income from continuing operations for 2012 was $135 million, or $2.63 diluted earnings per share, compared to $112 million, or $2.09 diluted earnings per share from continuing operations in the prior year.

Adjusted income from continuing operations for 2012 excludes after-tax charges of $3.6 million, net, which are derived from:

Free Cash Flow and Total Debt: Cash from operations for the fourth quarter was $157 million, up from $78 million in the prior-year quarter. Capital expenditures were $22 million in the fourth quarter compared to $16 million in the prior-year quarter. Free cash flow was $135 million, up from $63 million in the prior-year quarter. For the full year, cash from operations was approximately $221 million, up from $76 million in 2011. Capital expenditures were $50 million in 2012 compared to $41 million in 2011. Free cash flow was $171 million for the full year, up from $35 million in the prior year. The company repurchased $50 million of stock and paid $48 million of dividends in 2012. Total debt at the end of 2012 was $387 million, down $94 million from the third quarter and down $79 million from a year ago. Total cash and cash equivalents were $52 million ending 2012.

BUSINESS SEGMENT FINANCIAL HIGHLIGHTS

Residential Heating and Cooling

Fourth quarter results were negatively impacted by higher incentive compensation, lower mix, and strategic investments in distribution expansion, with offsets from higher volume and lower material costs. Full-year results were positively impacted by higher volume, favorable price, and lower material costs, with offsets from higher incentive compensation, lower mix, and strategic investments in distribution expansion.

Commercial Heating and Cooling

Fourth quarter and full year results were positively impacted by higher volume, favorable price/mix, and lower material costs, with an offset from higher incentive compensation.

Refrigeration

Fourth quarter results were negatively impacted by higher incentive compensation, with offsets from higher volume, favorable price/mix, and lower material costs. Full-year results were positively impacted by favorable price/mix and lower material costs, with offsets from lower volume, higher incentive compensation, and foreign exchange.

2013 FULL YEAR OUTLOOK

The company reiterates its 2013 guidance, originally provided on December 12, 2012:

CONFERENCE CALL INFORMATION

A conference call to discuss the company’s fourth quarter and full year 2012 results will be held this morning at 8:30 a.m. Central time. To listen, please call the conference call line at 612-288-0337 at least 10 minutes prior to the scheduled start time and use reservation number 278932. This conference call will also be webcast on Lennox International’s web site at http://www.lennoxinternational.com.

A replay will be available from 11:00 a.m. Central time on February 5 through February 12, 2013, by dialing 800-475-6701 (U.S.) or 320-365-3844 (international) and using access code 278932. This call will also be archived on the company’s web site.

Lennox International Inc. is a global leader in the heating, air conditioning, and refrigeration markets. Lennox International stock is traded on the New York Stock Exchange under the symbol “LII.” Additional information is available at http://www.lennoxinternational.com or by contacting Steve Harrison, Vice President, Investor Relations, at 972-497-6670.

The statements in this news release that are not historical statements, including statements regarding expected financial results for 2013, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are subject to numerous risks and uncertainties that could cause actual results to differ materially from the results expressed or implied by the statements. Risks and uncertainties that could cause actual results to differ materially from such statements include, but are not limited to: the impact of higher raw material prices, LII’s ability to implement price increases for its products and services, the impact of unfavorable weather, a decline in new construction activity and the related demand for products and services, and the timing, terms (including sales proceeds realized) and conditions of the divestiture of Service Experts and costs associated with such transaction. For information concerning these and other risks and uncertainties, see LII’s publicly available filings with the Securities and Exchange Commission. LII disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited, in millions, except per share data)

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

SEGMENT NET SALES AND PROFIT (LOSS)

(Unaudited, in millions)

Excluding:

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(In millions, except share and per share data)

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited, in millions)

LENNOX INTERNATIONAL INC. AND SUBSIDIARIES

Reconciliation to U.S. GAAP (Generally Accepted Accounting Principles) Measures

(Unaudited, In millions, except per share and ratio data)

Use of Non-GAAP Financial Measures

To supplement the Company’s consolidated financial statements and segment net sales and profit presented in accordance with U.S. GAAP, additional non-GAAP financial measures are provided and reconciled in the following tables. The Company believes that these non-GAAP financial measures, when considered together with the GAAP financial measures, provide information that is useful to investors in understanding period-over-period operating results. The Company believes that these non-GAAP financial measures enhance the ability of investors to analyze the Company’s business trends and operating performance.

Reconciliation of Income From Continuing Operations, a GAAP measure, to Adjusted Income From Continuing Operations, a Non-GAAP measure

Reconciliation of Estimated Adjusted Income per Share from Continuing Operations—Diluted, a Non-GAAP Measure, to Income per Share from Continuing Operations—Diluted, a GAAP Measure

Reconciliation of Net Cash Provided by (Used in) Operating Activities, a GAAP Measure, to Free Cash Flow, a Non-GAAP Measure

Calculation of Debt to EBITDA Ratio:

Reconciliation of EBIT, a Non-GAAP Measure, to Income From Continuing Operations Before Income Taxes, a GAAP measure