Las Cruces Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 3B (hot-dry). Las Cruces's Mesilla Valley desert location at 3,900 feet elevation produces very hot, dry summers (99°F/65°F cooling design) with minimal humidity, cold desert winters (22°F heating design), and moderate altitude derating (~91% of sea level).

Energy Code & Manual J Requirement: New Mexico Energy Code (IECC 2021). ACCA Manual J required for Doña Ana County HVAC permits.

Local Electric Utility: El Paso Electric

Building Department: City of Las Cruces Community Development Department

Local Trade Association: ASHRAE New Mexico Chapter