Pittsburgh Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 5A (cold-humid). Pittsburgh's river valley location produces cold winters (5°F heating design) and warm, humid summers (90°F/73°F cooling design). Significant microclimate variation between valley and hilltop locations.

Energy Code & Manual J Requirement: Pennsylvania Uniform Construction Code (IECC 2021). ACCA Manual J required for all Allegheny County and western Pennsylvania HVAC permit applications.

Local Electric Utility: Duquesne Light Company

Building Department: City of Pittsburgh Department of Permits, Licenses & Inspections

Local Trade Association: ACCA Pennsylvania / ASHRAE Western Pennsylvania Chapter / SMACNA Western PA