Murfreesboro Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 4A (mixed-humid). Murfreesboro shares Nashville's fundamental middle Tennessee climate — 16°F heating design and 95°F/76°F cooling design. Hot, humid summers and cold winters with occasional snow require robust four-season HVAC.

Energy Code & Manual J Requirement: Tennessee Energy Code (IECC 2021). ACCA Manual J required for residential HVAC permits in Rutherford County and all Murfreesboro jurisdictions.

Local Electric Utility: Murfreesboro Electric Department (MED, TVA distributor)

Building Department: City of Murfreesboro Building Codes Division

Local Trade Association: ACCA Tennessee