Des Moines Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 5A (cold-humid). Des Moines's central Iowa location produces hot, humid summers (92°F/74°F cooling design) and very cold winters (-6°F heating design). Both seasons drive meaningful equipment sizing requirements.

Energy Code & Manual J Requirement: Iowa Residential Energy Code (IECC 2012). ACCA Manual J required for Polk County and all Des Moines metro HVAC permits.

Local Electric Utility: MidAmerican Energy

Building Department: City of Des Moines Permit & Development Center

Local Trade Association: ASHRAE Iowa Chapter / PHCC Iowa / ACCA Midwest