Climate ZonesAlaskaDillingham

What Climate Zone is Dillingham, Alaska?

Dillingham is in IECC Climate Zone 8 (Subarctic). Get accurate Manual J load calculations with official design temperatures for Dillingham.

Climate Zone
8
Winter Design
-42°F
Summer Design
72°F
ZIP Codes
7

Dillingham HVAC Contractors: Get Your Free Manual J Report

Climate Zone 8 requires precise load calculations. Upload your Dillingham blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Dillingham's exact design temperatures (-42°F winter / 72°F summer).

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Verify Your Dillingham ZIP Code

Enter your ZIP code to confirm it's in Dillingham and get climate zone details.

Dillingham covers 7 ZIP codes: 99555, 99569, 99576, 99580, 99628, 99636, 99678

Dillingham Design Temperatures

Official ASHRAE design temperatures for Dillingham, used for accurate Manual J load calculations.

Winter 99% Design Temp
-42°F
Summer 1% Design Temp
72°F
Summer Wet Bulb
60°F

IECC Requirements for Zone 8

Minimum insulation and window requirements for Dillingham per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-60
Floor Insulation:R-38
Window U-Factor:0.3
Window SHGC:0.5

Energy Code: 2021 IECC

Recommended HVAC Equipment for Dillingham

Heating Systems

Gas furnace (98%+ AFUE)
Boiler
Oil furnace
Typical AFUE
97-98.5%

Cooling Systems

Not typically needed

Related Climate Zone Pages

Learn More About
Climate Zone 8
View All Zones in
Alaska
HVAC Permits for
Dillingham, Alaska

Get Free Manual J Calculations for Dillingham

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Dillingham design temps
Zone 8 compliant
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