Connecticut General Statutes §29-292:
Every new dwelling, building, or structure occupied in whole or in part for residential purposes that contains fossil-fuel burning equipment or incorporates enclosed parking within its structure must be equipped with working, approved CO alarms. (Effective date: October 1, 2005)

Public Act No. 11-248:
CO detection and warning equipment is required to be installed in all public and non-public schools. (Effective date: January 1, 2012)