Memphis Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 3A (mixed-humid). Memphis's Mississippi River Valley location produces very hot, humid summers (97°F/78°F cooling design) and genuine winters (20°F heating design). Among the most humidity-challenged major Tennessee cities.

Energy Code & Manual J Requirement: Tennessee Residential Building Code (IECC 2021). ACCA Manual J required for all Shelby County and Memphis metro HVAC permit applications.

Local Electric Utility: MLGW (Memphis Light, Gas and Water, TVA distributor)

Building Department: City of Memphis Division of Construction Code Enforcement

Local Trade Association: ACCA Tennessee / ASHRAE Mid-South Chapter / SMACNA Mid-South