Bridgeport Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 5A (cold-humid). Fairfield County's Long Island Sound shoreline and proximity to NYC produce a moderately maritime climate — slightly warmer winters than inland Connecticut, persistent humidity, and active four-season HVAC demands.

Energy Code & Manual J Requirement: Connecticut State Building Code (IECC 2021 basis). ACCA Manual J required for residential HVAC permits. Fairfield County towns individually administer permits — Stamford, Greenwich, Norwalk, Westport, and others each have their own building departments with consistent state code enforcement.

Local Electric Utility: United Illuminating (UI / Avangrid)

Building Department: City of Bridgeport Building Department

Local Trade Association: ACCA New England / ASHRAE Connecticut Chapter