New York City Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 4A (mixed-humid). NYC's dense urban heat island effect significantly amplifies summer cooling loads in Manhattan and dense borough neighborhoods above the official ASHRAE design conditions.

Energy Code & Manual J Requirement: New York Energy Conservation Construction Code (IECC 2024 basis) with NYC amendments. ACCA Manual J required for residential HVAC permits. NYC Department of Buildings administers all permits. Local Law 97 affects larger buildings.

Local Electric Utility: Con Edison (Consolidated Edison)

Building Department: NYC Department of Buildings (DOB)

Local Trade Association: ACCA New York / ASHRAE New York Chapter / SMACNA New York Metropolitan