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IECC 2021 · PNNL

Hawaii climate zones

Hawaii’s 5 counties fall in 1 IECC 2021 climate zone: 1A (5).

Zone 1A: very hot-humid

Attic target R30 (ENERGY STAR)

Hawaii County (Hot-humid) · Honolulu County (Hot-humid) · Kalawao County (Hot-humid) · Kauai County (Hot-humid) · Maui County (Hot-humid)

PNNL county zonesENERGY STAR insulation