EXHIBIT 10.18

SEVENTH AMENDMENT

TO

EMPLOYMENT AGREEMENT

This Seventh Amendment to Employment Agreement is
made and entered into effective as of January 1, 2007, by and between WATSCO, INC., a Florida corporation (hereinafter called the Company), and ALBERT H. NAHMAD(hereinafter called the Employee).

RECITALS

WHEREAS, the Company and the Employee entered into an Employment Agreement effective as of January 31, 1996 (the Employment Agreement) pursuant to which the Employee renders certain services to the Company; and

WHEREAS, the Compensation Committee of the Companys Board of Directors amended the Employment Agreement effective as of
January 1, 2001, January 1, 2002, January 1, 2003, January 1, 2004, January 1, 2005 and January 1, 2006; and

WHEREAS, the Compensation Committee of the Companys Board of Directors has determined to increase the Employees Base Salary from $960,000 to $998,000, effective as of January 1, 2007, and has
set the targets for the performance based compensation payable by the Company to the Employee for the year 2007; and

WHEREAS, the
Company and the Employee now desire to amend Employment Agreement and Exhibit A-1 to the Employment Agreement to reflect the increase in Base Salary and specify the performance based compensation amount payable by the Company to the Employee for the
calendar year 2007.

NOW, THEREFORE, in consideration of the mutual promises and covenants set forth in this Seventh
Amendment, and other good and valuable consideration, the parties to this Seventh Amendment agree as follows:





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1. All capitalized terms in this Seventh Amendment shall have the same meaning as in the Employment
Agreement, unless otherwise specified.

2. The first sentence of Section 4 of the Employment Agreement is hereby amended to read as
follows:

Effective as of January 1, 2007, the Company agrees to pay to Employee and Employee agrees to accept from the Company a
salary at the annual rate of not less than Nine Hundred Ninety Eight Thousand ($998,000) Dollars, payable in bi-weekly or monthly installments.

3. The Employment Agreement is hereby amended by replacing Exhibit A-1  2006 Performance Goals and Performance Based Compensation with the attached Exhibit A-1  2007 Performance Goals and
Performance Based Compensation thereto.

4. All other terms and conditions of the Employment Agreement shall remain the same.

IN WITNESS WHEREOF, the parties have caused this Seventh Amendment to be duly executed effective as of the day and year first above
written.



COMPANY:WATSCO, INC.By:

/s/ BARRY S. LOGANBarry S. Logan, Senior Vice PresidentEMPLOYEE:/s/ ALBERT H. NAHMADALBERT H. NAHMAD




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EXHIBIT A-1

2007 Performance Goals and Performance Based Compensation

II. Formula

|                                                                                                                                                                                                |  |                                        |       
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------------------------------- | ------
|                                                                                                                                                                                                |  | Performance Based Compensation Formula
|A. Earnings Per Share                                                                                                                                                                           |  |                                        |       
|For each $.01 increase                                                                                                                                                                          |  | $                                      | 65,250
|                                                                                                                                                                                                | 
|B. Increase in Common Stock Price                                                                                                                                                               |  |                                        |       
|(i) If the price of a share of Common Stock on 12/31/07 does not exceed $47.16                                                                                                                  |  | $                                      | 0     
|(ii) If the price of a share of Common Stock on 12/31/07 exceeds $47.16 but does not equal or exceed $55.00, for each $0.01 increase in per share price of a share
of Common Stock above $47.16 |  | $                                      | 1,200 
|(iii) If the price of a share of Common Stock on 12/31/07 equals or exceeds $55.00, for each $0.01 increase in per share price of a share of Common Stock above
$47.16                          |  | $                                      | 1,800 

III. Method of Payment



| | A. | Cash. The Performance Based Compensation determined for 2007 under the formula set forth in Section I above shall be paid in cash if and to the extent such Compensation does
not exceed $5,000,000.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | B. | Restricted Stock. If the Performance Based Compensation determined for 2007 under the formula set forth in Section I above exceeds $5,000,000 (such excess amount being
referred to as the Additional Amount), the Executive shall be granted a number of shares of restricted Class B Common Stock of the Company (the Shares) equal to the amount determined by dividing (i) two times the
Additional Amount, by (ii) the closing price for the Class B Common Stock of the Company on the American Stock Exchange as of the close of trading on December 31, 2007. The value of any fractional shares shall be paid in cash. The
restrictions on the Shares shall lapse on the first to occur of (i) October 15, 2018 (ii) termination of the Executives employment with the Company by reason of Executives disability or death, (iii) the
Executives termination of employment with the Company for Good Reason; (iv) the Companys termination of Executives employment without Cause, or (v) the occurrence of a Change in Control of the Company (Good
Reason, Cause, and Change in Control to be defined in a manner consistent with the most recent grant of Restricted Stock by the Company to the Executive).
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------





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IV. 2001 Incentive Compensation Plan

The performance based award and method of payment specified above (the Award) were made by the Compensation Committee in
accordance with Section 8 of the Companys 2001 Incentive Compensation Plan (the Incentive Plan) and are subject to the limitations contained in Section 5 of the Incentive Plan. The Award is intended to qualify as
performance based compensation under Section 162(m) of the Internal Revenue Code.



|                                       |  |                           
|-------------------------------------- |  | --------------------------
|Dated: Effective as of January 1, 2007 |  | /s/ PAUL F. MANLEY        
|                                       |  | Paul F. Manley, Chairman  
|                                       |  | Compensation Committee    
|                                       | 
|                                       |  | Acknowledged and Accepted:
|                                       | 
|                                       |  | /s/ ALBERT H. NAHMAD      
|                                       |  | Albert H. Nahmad