Applicable Building Type(s)

New residential

Policy Requirement Level

Model Code

Policy Sequence

Governance

Development Authority: International Code Council

Implementation Authority: Adopting state or local jurisdictions

Prescriptive Compliance path

Energy Requirements:

Performance Compliance path

Energy Requirements:

Resources

Notes

Climate zones

ZONE
NUMBER
THERMAL CRITERIA
IP Units
SI Units
1
9000 < CDD50°F 5000 < CDD10°C
2
6300 < CDD50°F ≤ 9000 3500 < CDD10°C ≤ 5000
3A and 3B
4500 < CDD50°F ≤ 6300
AND HDD65°F ≤ 5400
2500 < CDD10°C ≤ 3500
AND HDD18°C ≤ 3000
4A and 4B
CDD50°F ≤ 4500 AND
HDD65°F ≤ 5400
CDD10°C ≤ 2500 AND
HDD18°C ≤ 3000
3C
HDD65°F ≤ 3600 HDD18°C ≤ 2000
4C
3600 < HDD65°F ≤ 5400 2000 < HDD18°C ≤ 3000
5
5400 < HDD65°F ≤ 7200 3000 < HDD18°C ≤4000
6
7200 < HDD65°F ≤ 9000 4000 < HDD18°C ≤ 5000
7
9000 < HDD65°F ≤ 12600 5000 < HDD18°C ≤ 7000
8
12600 < HDD65°F 7000 < HDD18 °C