Lexington Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 4A (mixed-humid). Lexington's Bluegrass Plateau position produces a somewhat moderated climate compared to Louisville — similar humidity and seasonal pattern with slightly different temperature profile.

Energy Code & Manual J Requirement: Kentucky Residential Building Code (IECC 2009). ACCA Manual J required for Fayette County and all Lexington metro HVAC permits.

Local Electric Utility: Kentucky Utilities (KU / LG&E KU Energy)

Building Department: Lexington-Fayette Urban County Government Building Inspection

Local Trade Association: PHCC Kentucky / ASHRAE Kentucky Chapter