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Exhibit 10.10    
    

 
 

EMPLOYMENT AGREEMENT    
    

        THIS EMPLOYMENT AGREEMENT (this "Agreement") between COMFORT SYSTEMS USA, INC., a Delaware corporation
(referred to herein individually as "Comfort" and collectively with its subsidiaries and affiliates as the "Company"), and Thomas Tanner ("Executive") is entered into and effective as of the
1st day of January, 2004. This Agreement supersedes any other employment agreements or understandings, written or oral, between the Company and Executive. 

R E C I T A L S  

        The following statements are true and correct: 

        As
of the date of this Agreement, the Company is engaged in the business of mechanical contracting services, including heating, ventilation and air conditioning, plumbing, piping,
electrical and related services ("Services"). 

        Executive
is employed hereunder by the Company in a confidential relationship wherein Executive, in the course of Executive's employment with the Company, has and will continue to become
familiar with and aware of information as to the Company's and its customers' specific manner of doing business, including the processes, techniques and trade secrets utilized by the Company, and
future plans with respect thereto, all of which has been and will be established and maintained at great expense to the Company. This information is a trade secret and constitutes the valuable
goodwill of the Company. 

        NOW, THEREFORE, in consideration of the mutual promises, terms, covenants and conditions set forth herein and the performance of each, the
Company and Executive hereby agree as follows: 

A G R E E M E N T S  

        1.     Employment and Duties.

        (a)   The
Company hereby employs Executive in an executive position and Executive hereby accepts this employment upon the terms and conditions herein contained. Executive
agrees to devote substantially all of Executive's business time, attention and efforts to promote and further the business of the Company. 

        (b)   Executive
shall faithfully adhere to, execute and fulfill all lawful policies established by the Company, including the Company's Corporate Compliance Policy. 

        (c)   Executive
shall not, during the term of Executive's employment hereunder, be engaged in any other business activity pursued for gain, profit or other pecuniary advantage
if such activity interferes in any material respect with Executive's duties and responsibilities hereunder. The foregoing limitations shall not be construed as prohibiting Executive from making
personal investments in such form or manner as will neither require Executive's services in the operation or affairs of the companies or enterprises in which such investments are made nor violate the
terms of Section 4 hereof. 

        2.     Compensation.    For all services rendered by Executive, the Company shall compensate Executive as follows: 

        (a)   Base Salary. Effective the date hereof, the base salary payable to Executive shall be $195,000 per year, payable on a
regular basis in accordance with the Company's standard payroll procedures, but not less often than monthly. 

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        (b)   Executive Perquisites, Benefits and Other Compensation. Executive shall be entitled to receive additional benefits and
compensation from the Company in such form and to the extent specified below: 

          (i)  Coverage,
subject to contributions required of employees generally, for Executive and Executive's dependent family members under health, hospitalization, disability,
dental, life and other insurance plans that the Company may have in effect from time to time for the benefit of its employees. 

         (ii)  Reimbursement
for all business travel and other out-of-pocket expenses reasonably incurred by Executive in the performance of Executive's
services pursuant to this Agreement. Reimbursable expenses shall be appropriately documented in reasonable detail by Executive, and shall be in a format consistent with the Company's expense reporting
policy. 

        3.     Confidentiality.

        (a)   Confidential Information. As used herein, the term "Confidential Information" means any information, technical data or
know-how of the Company, including, but not limited to, that which relates to customers, business affairs, business plans, financial matters, financial plans and projections, pending and
proposed acquisitions, operational and hiring matters, contracts and agreements, marketing, sales and pricing, prospects of the Company, and any information, technical data or know-how
that contain or reflect any of the foregoing, whether prepared by the Company, Executive or any other person or entity; provided, however, that the term
"Confidential Information" shall not include information, technical data or know-how that Executive can demonstrate is generally available to the public not as a result of any breach of
this Agreement by Executive. 

        (b)   No Disclosure. Except in the performance of Executive's duties as an employee of the Company, Executive will not, during
or after the term of Executive's engagement with the Company, disclose to any person or entity or use, for any reason whatsoever, any Confidential Information. 

        4.     Non-Competition Agreement.

        (a)   Competition. Executive will not, during the period of Executive's employment by or with the Company, and for a period of
twelve months immediately following the termination of Executive's employment, for any reason whatsoever, directly or indirectly, on behalf of Executive or on behalf of or in conjunction with any
other person, company, partnership, corporation or business of whatever nature: 

          (i)  engage,
as an officer, director, shareholder, owner, partner, joint venturer, or in a managerial capacity, whether as an employee, independent contractor, consultant or
advisor, or as a sales representative, or make or guarantee loans or invest in or for any business engaged in Services in competition with the Company within 100 miles of where the Company conducts or
has conducted business during the Term (the "Territory"); 

         (ii)  call
upon any person who is, at that time, within the Territory, an employee of the Company in a technical, managerial or sales capacity for the purpose or with the
intent of enticing such employee away from or out of the employ of the Company; 

        (iii)  call
upon any person or entity which is, at that time, or which has been, within two (2) years prior to that time, a customer of the Company for the purpose of
soliciting or selling Services; 

        (iv)  call
upon any prospective acquisition candidate, on Executive's own behalf or on behalf of any competitor, which candidate was either called upon by the Executive on
behalf of the Company or for which the Executive made an acquisition analysis on behalf of the Company for the purpose of acquiring such entity. 

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Notwithstanding
the above, the foregoing covenants shall not be deemed to prohibit Executive from acquiring as an investment not more than one percent (1%) of the capital stock of a competing business
whose stock is traded on a national securities exchange or on an over-the-counter or similar market. 

        (b)   No Violation. It is specifically agreed that the period during which the agreements and covenants of Executive made in
this Section 4 shall be effective shall be computed by excluding from such computation any time during which Executive is in violation of any provision of this Section 4. 

        5.     Term; Termination; Rights on Termination.    The term of this Agreement shall begin on the date hereof and
continue for two (2) (the "Term"), unless terminated sooner as herein provided. Beginning on the second anniversary and thereafter on each anniversary this Agreement shall renew for consecutive
one-year terms unless either party shall give the other notice at least 30 days prior to such anniversary. This Agreement and Executive's employment may be terminated in any one of
the following ways: 

        (a)   Death. The death of Executive shall immediately terminate this Agreement with no severance compensation due to
Executive's estate. 

        (b)   Disability. If, as a result of incapacity due to physical or mental illness or injury, Executive shall have been absent
from Executive's full-time duties hereunder for four (4) consecutive months, then thirty (30) days after receiving written notice (which notice may occur before or after the
end of such four (4) month period, but which shall not be effective earlier than the last day of such four (4) month period), the Company may terminate Executive's employment hereunder,
provided Executive is unable to resume Executive's full-time duties at the conclusion of such notice period. In the event this Agreement is terminated as a result of Executive's
disability, Executive shall receive from the Company Executive's base salary at the rate then in effect for the lesser of the time period remaining under the Term of this Agreement or for one
(1) year, and such amount shall be payable during such period in a manner consistent with Company's standard pay practices. The amount payable hereunder shall be decreased by the amount of
benefits otherwise actually paid by the Company to Executive or on Executive's behalf or under any insurance procured by the Company. 

        (c)   Good Cause. The Company may terminate this Agreement ten (10) days after written notice to Executive for good
cause, which shall include any of the following: (i) Executive's willful or material breach of this Agreement; (ii) Executive's failure to perform any of his material duties following
notice by the Company to Executive of such improper performance and Executive's failure to correct the improper performance to the satisfaction of the Company within a reasonable time;
(iii) Executive's gross negligence in the performance or intentional nonperformance of any of Executive's material duties and responsibilities hereunder; (iv) Executive's willful
dishonesty, fraud or misconduct with respect to the business or affairs of the Company or any other member of the Comfort Group; (v) Executive's conviction of a felony crime;
(vi) Executive's confirmed positive illegal drug test result; (vii) sexual harassment by Executive; or (viii) willful or material failure by Executive to comply with Comfort's
Corporate Compliance Policy or other Company policies. In the event of a termination for good cause, as enumerated above, Executive shall have no right to any severance compensation. 

        (d)   Without Cause. At any time after the commencement of Executive's employment, Executive or the Company may, without cause,
terminate this Agreement and Executive's employment, effective thirty (30) days after receipt of written notice. Should Executive be terminated by the Company without cause, Executive shall
receive from the Company Executive's base salary at the rate then in effect for one (1) year, and such amount shall be payable during such period in a manner consistent with the Company's
standard pay practices. 

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        (e)   Change in Control. In addition to the foregoing, Company has agreed that it will pay to Executive a bonus equal to one
year of base salary within twenty business days of the definitive and final closing of any change of control of Comfort Systems USA, Inc. (a transaction that results in the sale of a majority
of the Comfort's voting capital stock or substantially all of Comfort's assets). 

        6.     Return of Company Property.    All records, plans, manuals, "field guides", memoranda, lists, documents,
statements and other property delivered to Executive by or on behalf of the Company, by any customer of the Company (including but not limited to, any such customers obtained by Executive), by any
acquisition candidate of the Company, and all records compiled by Executive which pertain to the business or activities of the Company shall be and remain the property of the Company and shall be
subject at all times to its discretion and control. Likewise, all correspondence with customers, representatives or acquisition candidates, reports, records, charts, advertising materials, and any
data collected by Executive, or by or on behalf of the Company or any representative of the Company shall be delivered promptly to the Company without request by it upon termination of Executive's
engagement with the Company. 

        7.     Inventions.    Executive shall disclose promptly to the Company any and all significant conceptions and ideas
for inventions, improvements and valuable discoveries, whether patentable or not, which are conceived or made by Executive, solely or jointly with another, during the period of Executive's employment
or within one (1) year thereafter, and which are directly related to the business or activities of the Company or which Executive conceives as a result of Executive's employment by the Company.
Executive hereby assigns and agrees to assign all Executive's interests therein to the Company or its nominee. Whenever requested to do so by the Company, Executive shall execute any and all
applications, assignments or other instruments that the Company shall deem necessary to apply for and obtain Letters Patent of the United States or any foreign country or to otherwise protect the
Company's interest therein. 

        8.     Trade Secrets.    Executive agrees that Executive will not, during or after the Term, disclose the specific
terms of the Company's relationships or agreements with significant vendors or customers or any other significant and material trade secret of the Company, whether in existence or proposed, to any
person, firm, partnership, corporation or business for any reason or purpose whatsoever. 

        9.     No Prior Agreements.    Executive hereby represents and warrants to the Company that the execution of this
Agreement by Executive and Executive's employment by the Company and the performance of Executive's duties hereunder will not violate or be a breach of any agreement with a former employer, client or
any other person or entity. Further, Executive agrees to indemnify the Company for any claim, including, but not limited to, attorneys' fees and expenses of investigation, by any such third party that
such third party may now have or may hereafter come to have against the Company based upon or arising out of any non-competition agreement, invention or secrecy agreement between Executive
and such third party which was in existence as of the date of this Agreement. 

        10.   Assignment; Binding Effect.    Executive understands that Executive has been selected for employment by the
Company on the basis of Executive's personal qualifications, experience and skills. Executive agrees, therefore, that Executive cannot assign all or any portion of Executive's performance under this
Agreement. Executive, Executive's spouse and the estates of each shall not have any right to encumber or dispose of any right to receive payments hereunder, it being understood that such payments and
the right thereto are nonassignable and nontransferable; provided, however in the event of the death of Executive, any payments that Executive is entitled to receive may be assigned to the
beneficiaries of Executive's estate. Subject to the preceding three (3) sentences and the express provisions of Section 11 below, this Agreement shall be binding upon, inure to the
benefit of and be enforceable by the parties hereto and their respective heirs, legal representatives, successors and assigns. 

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        11.   Complete Agreement.    Executive has no oral representations, understandings or agreements with the Company or
any of its officers, directors or representatives covering the same subject matter as this Agreement. This Agreement is the final, complete and exclusive statement and expression of the agreement
between the Company and Executive and of all the terms of this Agreement, and it cannot be varied, contradicted or supplemented by evidence of any prior or contemporaneous oral or written agreements. 

        12.   Amendment; Waiver.    This Agreement may not be modified except in writing signed by the parties, and no term
of this Agreement may be waived except by a writing signed by the party waiving the benefit of such terms. No waiver by the parties hereto of any default or breach of any term, condition or covenant
of this Agreement shall be deemed to be a waiver of any subsequent default or breach of the same or any other term, condition or covenant contained herein. 

        13.   Notice.    Whenever any notice is required hereunder, it shall be given in writing addressed as follows: 

	 	 	To the Company:	 	Comfort Systems USA, Inc.

777 Post Oak Boulevard, Ste. 500

Houston, TX 77056

Attention: General Counsel
	

 	
 	

To Executive:	
 	

Thomas Tanner

6862 Claret Circle

Fayetteville, NY 13066

Notice shall be deemed given and effective on the earlier of five (5) days after the deposit in the U.S. mail of a writing addressed as above and sent first class mail,
certified, return receipt requested, or when actually received. Either party may change the address for notice by notifying the other party of such change in accordance with this Section 13. 

        14.   Severability; Enforceability.    If any portion of this Agreement is held invalid or inoperative, the other
portions of this Agreement shall be deemed valid and operative and, so far as is reasonable and possible, effect shall be given to the intent manifested by the portion held invalid or inoperative.
Moreover, in the event any court of competent jurisdiction shall determine that the scope, time or territorial restrictions set forth in any covenant contained herein are unreasonable, then it is the
intention of the parties that such restrictions be enforced to the fullest extent which the court deems reasonable, and this Agreement shall thereby be reformed. Each of the covenants contained in
this Agreement shall be construed as an agreement independent of any other provision in this Agreement, and the existence of any claim or cause of action of Executive against the Company, whether
predicated on this Agreement or otherwise, shall not constitute a defense to the enforcement by the Company of such covenants. 

        15.   Survival.    The provisions and covenants of Sections 3, 4, 6, 7 and 8 shall survive termination of this
Agreement. 

        16.   Specific Performance.    Because of the difficulty of measuring economic losses to the Company as a result of a
breach of the covenants contained in Sections 3, 4, 6, 7 and 8 and because of the immediate and irreparable damage that could be caused to the Company for which it would have no other adequate remedy,
Executive agrees that the Company shall be entitled to specific performance and that such covenants may be enforced by the Company in the event of any breach or threatened breach by Executive, by
injunctions, restraining orders and other appropriate equitable relief. Executive further agrees to waive any requirement for the securing or posting of any bond in excess of $50,000 in connection
with the obtaining of any such injunctive or any other equitable relief. 

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        17.   Arbitration.    With the exception of Sections 4 and 8, any unresolved dispute or controversy arising under or
in connection with this Agreement shall be settled exclusively by arbitration, conducted by a single arbitrator in Houston, Texas, in accordance with the National Rules for the Resolution of
Employment Disputes of the American Arbitration Association ("AAA") then in effect, provided that the parties may agree to use arbitrators other than those provided by the AAA. The arbitrators shall
not have the authority to add to, detract from, or modify any provision hereof nor to award punitive damages to any injured party. The arbitrators shall have the authority to order back pay, severance
compensation, reimbursement of costs, including those incurred to enforce this Agreement, and interest thereon. A decision by the arbitrator shall be final and binding. Judgment may be entered on the
arbitrator's award in any court having jurisdiction. Responsibility for bearing the cost of the arbitration shall be determined by the arbitrator and shall be proportional to the arbitrator's decision
on the merits. 

        18.   Attorney's Fees.    If any litigation is instituted to enforce or interpret the provisions of this Agreement or
the transactions described herein, the prevailing party in such action shall be entitled to recover such party's reasonable attorneys' fees and other costs from the other party hereto. 

        19.   Governing Law.    This Agreement shall be governed by and construed in accordance with the internal laws of the
State of Texas. 

        20.   Counterparts.    This Agreement may be executed in multiple counterparts, each of which shall be deemed to be
an original and all of which together shall constitute one and the same instrument. 

        IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written. 

	EXECUTIVE:	 	COMPANY:
	

 	
 	

COMFORT SYSTEMS USA, INC.
	

/s/  THOMAS TANNER      
 Thomas Tanner	
 	

/s/  WILLIAM MURDY      
 William Murdy

Chief Executive Officer

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Exhibit 10.10

EMPLOYMENT AGREEMENTQuickLinks
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Exhibit 10.15    
    

 
 

AMENDMENT NO. 1 TO STOCK PURCHASE
  WARRANT AND REPURCHASE AGREEMENT    
    

        This Amendment No. 1 to Stock Purchase Warrant and Repurchase Agreement, dated as of December 31, 2003 (this
"Amendment"), is entered into by and among Comfort Systems USA, Inc., a Delaware corporation
("Company") and General Electric Capital Corporation ("Holder"). 

RECITALS  

        WHEREAS, Company and Holder are parties to that certain Stock Purchase Warrant and Repurchase Agreement, dated as
of October 11, 2002 (the "Warrant Agreement"); 

        WHEREAS, Company and Holder are desirous of amending the Warrant Agreement to the extent set forth herein and subject to the terms and
conditions set forth herein; and 

        WHEREAS, these Recitals shall be construed as part of this Amendment; 

        NOW THEREFORE, in consideration of the premises and the mutual covenants hereinafter contained, and for good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged by the parties, Agent and Holder hereby agree as follows: 

        1.    Definitions.    Except to the extent otherwise specified herein, capitalized terms used in this Amendment shall
have the same meanings ascribed to them in the Warrant Agreement. 

        2.    Amendment.    The Warrant Agreement is amended as follows: 

        2.1.  Clause (i)
of Section 6 of the Warrant Agreement is hereby amended and restated in its entirety as follows: 

"(i) At
any time during the period commencing on the earliest to occur of (a) the consummation of a Qualifying Public Offering or (b) a Change of Control (each, a
"Trigger Event") and ending on the fifth anniversary of the Date of Issuance, the Holder will have the right to cause the Company to repurchase (the
"Put") all or any portion of the Holder's shares of Underlying Warrant Stock then in existence by delivering written notice (the "Put Notice") to the
Company. The date on which the Company receives a Put Notice hereinafter is referred to as a "Delivery Date."" 

        3.    Reference to and Effect Upon the Warrant Agreement.    

        3.1.  Except
for the specific amendment set forth in Section 2 above, the Warrant Agreement shall remain in full force and effect and is hereby ratified and confirmed
in all respects. 

        3.2.  Each
reference in the Warrant Agreement to "this Agreement", "hereunder", "hereof", "herein" or any other word or words of similar import shall mean and be a reference
to the Warrant Agreement as modified hereby. 

        4.    Counterparts.    This Amendment may be executed in any number of counterparts, each of which when so executed
shall be deemed an original but all such counterparts shall constitute one and the same instrument. Delivery of an executed counterpart of a signature page to this Amendment by telecopier shall be as
effective as delivery of a manually executed counterpart signature page to this Amendment. 

        5.    GOVERNING LAW.    THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE INTERNAL
LAWS (AS OPPOSED TO CONFLICTS OF LAW PROVISIONS) OF THE STATE OF NEW YORK. 

        6.    Headings.    Section headings in this Amendment are included herein for convenience of reference only and shall
not constitute a part of this Amendment for any other purpose. 

[Signature
Pages Follow] 

 

        IN
WITNESS WHEREOF, this Amendment has been duly executed as of the date first written above. 

	 	 	COMPANY:
	

 	
 	
COMFORT SYSTEMS USA, INC.
	

 	
 	

By:	

/s/  J. GORDON BEITTENMILLER      
 Name: J. Gordon Beittenmiller

Title: Executive Vice President and Chief Financial Officer
	

 	
 	

HOLDER:
	

 	
 	

GENERAL ELECTRIC CAPITAL CORPORATION
	

 	
 	

By:	

/s/  SUSAN K. STAUB      
 Its Duly Authorized Signatory

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Exhibit 10.15

AMENDMENT NO. 1 TO STOCK PURCHASE WARRANT AND REPURCHASE AGREEMENT

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