North Carolina
North Carolina load calculations for permits.
From the Outer Banks to the Blue Ridge, North Carolina covers three climate zones. We size to your county’s design weather and the state’s own residential code.
IECC Climate Zone 3A along the coast and southern Piedmont, 4A across most of the Piedmont including Raleigh and Greensboro, and 5A in the mountains.
What matters in North Carolina
- North Carolina publishes its own Residential Code, based on the IRC, and local building departments enforce it.
- A Charlotte design copied to Asheville or Wilmington is not the same design. Design temperatures shift with elevation and distance from the coast.
- Humid summers mean latent load is part of every cooling selection.
Services in North Carolina
Every service is available statewide: Manual J, Manual S, Manual D, Manual N, Manual T, VRF design, energy calculations and permit documents.
Cities we work in
Anywhere in North Carolina, including:
- Charlotte
- Raleigh
- Durham
- Cary
- Chapel Hill
- Greensboro
- Winston-Salem
- Wilmington
- Asheville
- Fayetteville
- Concord
- Mooresville
Questions
Do you work in North Carolina?
Yes. We prepare load calculations, duct designs and energy reports for projects anywhere in North Carolina. Everything is done remotely from your plans.
What design conditions do you use for North Carolina?
We use ACCA design weather for the location closest to your project and the climate zone for your county, then state those assumptions in the report.
How do I get started?
Send us your questionnaire and plans, and we’ll get you an estimate right away.
Fast estimates
Send the plans. Get an estimate.
Send us your questionnaire and plans, and we’ll get you an estimate right away. Reach out during office hours and you’ll hear back within 30 minutes, whether it’s an email, text or call.