YES — Idaho has adopted 2018 IECC which requires HVAC loads be calculated per ACCA Manual J for new construction and major renovations.
Idaho has adopted 2018 IECC as the statewide energy code for residential construction.
Primary zone covering Boise and surrounding areas
Additional zone in Idaho
Local Idaho contractors typically charge $150-400 for Manual J calculations. AutoHVAC offers your first Manual J calculation completely FREE with permit-ready results in 60 seconds — no credit card required.
Yes. Idaho follows 2018 IECC which requires heating and cooling loads be calculated per ACCA Manual J for permits on new construction and major HVAC work.
You can get a free Manual J calculation for Idaho instantly at AutoHVAC — upload your blueprint and receive a permit-ready report in 60 seconds. Alternatively, local Idaho HVAC contractors charge $150-400 with 3-7 day turnaround, or you can use DIY software like Wrightsoft or CoolCalc ($5-200+/month).
Idaho includes IECC climate zones 5B, 6B. Zone 5B is most common, covering cities like Boise, Meridian, Nampa. Climate zone data determines design temperatures and insulation requirements used in Manual J calculations.
Join thousands of Idaho contractors who use AutoHVAC for instant, permit-ready load calculations.
Get Free Idaho Manual JNo credit card required • Results in 60 seconds