Climate ZonesAlaskaKetchikan Gateway

What Climate Zone is Ketchikan Gateway, Alaska?

Ketchikan Gateway is in IECC Climate Zone 7 (Very Cold). Get accurate Manual J load calculations with official design temperatures for Ketchikan Gateway.

Climate Zone
7
Winter Design
-18°F
Summer Design
87°F
ZIP Codes
2

Ketchikan Gateway HVAC Contractors: Get Your Free Manual J Report

Climate Zone 7 requires precise load calculations. Upload your Ketchikan Gateway blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Ketchikan Gateway's exact design temperatures (-18°F winter / 87°F summer).

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Verify Your Ketchikan Gateway ZIP Code

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

Ketchikan Gateway covers 2 ZIP codes: 99901, 99928

Ketchikan Gateway Design Temperatures

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

Winter 99% Design Temp
-18°F
Summer 1% Design Temp
87°F
Summer Wet Bulb
70°F

IECC Requirements for Zone 7

Minimum insulation and window requirements for Ketchikan Gateway per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-60
Floor Insulation:R-38
Window U-Factor:0.3
Window SHGC:0.45

Energy Code: 2021 IECC

Recommended HVAC Equipment for Ketchikan Gateway

Heating Systems

Gas furnace (97%+ AFUE)
Boiler
Cold climate heat pump with backup
Typical AFUE
97-98.5%

Cooling Systems

AC (minimal, 13 SEER)
Typical SEER
13 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 7
View All Zones in
Alaska
HVAC Permits for
Ketchikan Gateway, Alaska

Get Free Manual J Calculations for Ketchikan Gateway

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Ketchikan Gateway design temps
Zone 7 compliant
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