<SEC-DOCUMENT>0001172661-16-002968-index.html : 20160216
<SEC-HEADER>0001172661-16-002968.hdr.sgml : 20160215
<ACCEPTANCE-DATETIME>20160216170801
ACCESSION NUMBER:		0001172661-16-002968
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20160216
DATE AS OF CHANGE:		20160216

SUBJECT COMPANY:	

	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:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-53565
		FILM NUMBER:		161430091

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Praesidium Investment Management Company, LLC
		CENTRAL INDEX KEY:			0001320769
		IRS NUMBER:				200302413
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		1411 BROADWAY
		STREET 2:		29TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018
		BUSINESS PHONE:		(212) 821-1495

	MAIL ADDRESS:	
		STREET 1:		1411 BROADWAY
		STREET 2:		29TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10018
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>fix123115a4.htm
<TEXT>
Document 1 - file: fix123115a4.htm

</DOCUMENT>
</SEC-DOCUMENT>