COMFORT SYSTEMS USA INC — Director's Dealing 2021

May 4, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMFORT SYSTEMS USA INC (FIX)
CIK: 0001035983
Period of Report: 2021-05-03

Reporting Person: Krusi Alan (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-03	Common Stock	S	2000	$84.2749	Disposed	30914	Indirect

Footnotes

F1: This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.

F2: Represents the average price of shares sold; full information regarding the number of shares sold and specific prices will be made available upon request to the Company's Office of the General Counsel.

F3: Held by The Krusi Family Trust for which the Reporting Person and his spouse are trustees.