Concord Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 6A (cold-humid). Concord's central NH location is slightly colder than southern NH — -1°F heating design vs. 2°F for Manchester/Nashua — reflecting its more northerly inland position.

Energy Code & Manual J Requirement: New Hampshire State Building Code (IECC 2018). ACCA Manual J required for Merrimack County HVAC permits.

Local Electric Utility: Eversource Energy (Public Service of NH)

Building Department: City of Concord Building Department

Local Trade Association: PHCC New Hampshire / ASHRAE New England Chapter