    <SEC-DOCUMENT>0001104659-23-025305-index.html : 20230224
    <SEC-HEADER>0001104659-23-025305.hdr.sgml : 20230224
    <ACCEPTANCE-DATETIME>20230224160647
    ACCESSION NUMBER:		0001104659-23-025305
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		33
    CONFORMED PERIOD OF REPORT:	20230224
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20230224
    DATE AS OF CHANGE:		20230224

    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:		23667055

    	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>tm237726d1_8k.htm
    <DESCRIPTION>FORM 8-K
    <TEXT>
    Document 1 - file: tm237726d1_8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>tm237726d1_ex99-1.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: tm237726d1_ex99-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>fix-20230224.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 3 - file: fix-20230224.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>fix-20230224_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 4 - file: fix-20230224_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>fix-20230224_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 5 - file: fix-20230224_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>tm237726d1_ex99-1img001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: tm237726d1_ex99-1img001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>tm237726d1_ex99-1img002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: tm237726d1_ex99-1img002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>tm237726d1_ex99-1img003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: tm237726d1_ex99-1img003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>tm237726d1_ex99-1img004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: tm237726d1_ex99-1img004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>tm237726d1_ex99-1img005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: tm237726d1_ex99-1img005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>tm237726d1_ex99-1img006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: tm237726d1_ex99-1img006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>tm237726d1_ex99-1img007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: tm237726d1_ex99-1img007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>tm237726d1_ex99-1img008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: tm237726d1_ex99-1img008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>tm237726d1_ex99-1img009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: tm237726d1_ex99-1img009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>tm237726d1_ex99-1img010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: tm237726d1_ex99-1img010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>tm237726d1_ex99-1img011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: tm237726d1_ex99-1img011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>tm237726d1_ex99-1img012.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: tm237726d1_ex99-1img012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>tm237726d1_ex99-1img013.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: tm237726d1_ex99-1img013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>tm237726d1_ex99-1img014.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: tm237726d1_ex99-1img014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>tm237726d1_ex99-1img015.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: tm237726d1_ex99-1img015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>tm237726d1_ex99-1img016.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: tm237726d1_ex99-1img016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>tm237726d1_ex99-1img017.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: tm237726d1_ex99-1img017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>tm237726d1_ex99-1img018.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: tm237726d1_ex99-1img018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>tm237726d1_ex99-1img019.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: tm237726d1_ex99-1img019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>tm237726d1_ex99-1img020.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: tm237726d1_ex99-1img020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>26
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>27
    <FILENAME>tm237726d1_8k_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: tm237726d1_8k_htm.html

    Document 27 - RAW XML: tm237726d1_8k_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>28
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 28 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>29
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 29 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>30
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 30 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>31
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 31 - file: FilingSummary.html

    Document 31 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>33
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 33 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>34
    <FILENAME>0001104659-23-025305-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 34 - file: 0001104659-23-025305-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>