Comfort Systems USA, Inc. announced earnings results for the first quarter ended March 31, 2021. For the first quarter, the company announced sales was USD 669.761 million compared to USD 700.131 million a year ago. Operating income was USD 35.605 million compared to USD 24.723 million a year ago. Net income was USD 26.491 million compared to USD 17.716 million a year ago. Basic earnings per share from continuing operations was USD 0.73 compared to USD 0.48 a year ago.