    <SEC-DOCUMENT>0001104659-17-066030-index.html : 20171103
    <SEC-HEADER>0001104659-17-066030.hdr.sgml : 20171103
    <ACCEPTANCE-DATETIME>20171103160344
    ACCESSION NUMBER:		0001104659-17-066030
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		25
    CONFORMED PERIOD OF REPORT:	20171103
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20171103
    DATE AS OF CHANGE:		20171103

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			COMFORT SYSTEMS USA INC
    		CENTRAL INDEX KEY:			0001035983
    		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRICAL WORK [1731]
    		IRS NUMBER:				760526487
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13011
    		FILM NUMBER:		171176416

    	BUSINESS ADDRESS:
    		STREET 1:		675 BERING DRIVE
    		STREET 2:		SUITE 400
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77057
    		BUSINESS PHONE:		7138309600

    	MAIL ADDRESS:
    		STREET 1:		675 BERING DRIVE
    		STREET 2:		SUITE 400
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77057
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a17-25107_18k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a17-25107_18k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>a17-25107_1ex99d1.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: a17-25107_1ex99d1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g251071mmi001.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g251071mmi001.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g251071mmi002.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g251071mmi002.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g251071mmi003.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g251071mmi003.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g251071mmi004.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g251071mmi004.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g251071mmi005.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g251071mmi005.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g251071mmi006.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g251071mmi006.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g251071mmi007.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g251071mmi007.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g251071mmi008.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g251071mmi008.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>g251071mmi009.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g251071mmi009.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>g251071mmi010.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g251071mmi010.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>g251071mmi011.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g251071mmi011.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>g251071mmi012.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: g251071mmi012.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>g251071mmi013.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g251071mmi013.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>g251071mmi014.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g251071mmi014.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>g251071mmi015.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: g251071mmi015.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>g251071mmi016.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g251071mmi016.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>g251071mmi017.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g251071mmi017.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>g251071mmi018.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: g251071mmi018.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>g251071mmi019.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: g251071mmi019.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>g251071mmi020.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: g251071mmi020.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>g251071mmi021.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: g251071mmi021.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>g251071mmi022.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: g251071mmi022.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>g251071mmi023.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: g251071mmi023.gif

    </DOCUMENT>
    </SEC-DOCUMENT>