Casper Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 6B (cold-dry). Casper's central Wyoming location (5,150 ft elevation) produces very cold, dry winters (-9°F heating design) and hot, dry summers (92°F/60°F cooling design). High wind exposure is a defining characteristic.

Energy Code & Manual J Requirement: Wyoming Residential Building Code (IECC 2018). ACCA Manual J required for all Natrona County HVAC permit applications.

Local Electric Utility: Rocky Mountain Power (PacifiCorp)

Building Department: City of Casper Planning & Development Department

Local Trade Association: PHCC Wyoming / ASHRAE Mountain Desert Chapter