Climate ZonesAlaskaYukon-Koyukuk

What Climate Zone is Yukon-Koyukuk, Alaska?

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

Climate Zone
8
Winter Design
-42°F
Summer Design
72°F
ZIP Codes
31

Yukon-Koyukuk HVAC Contractors: Get Your Free Manual J Report

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

Claim Free Report
No credit card required

Verify Your Yukon-Koyukuk ZIP Code

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

Yukon-Koyukuk covers 31 ZIP codes: 99558, 99590, 99602, 99627, 99665, 99675, 99691, 99720, 99722, 99724 and 21 more

Yukon-Koyukuk Design Temperatures

Official ASHRAE design temperatures for Yukon-Koyukuk, 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 Yukon-Koyukuk 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 Yukon-Koyukuk

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
Yukon-Koyukuk, Alaska

Get Free Manual J Calculations for Yukon-Koyukuk

Upload your Yukon-Koyukuk blueprint and get a professional Manual J load calculation using official Zone 8 design temperatures. First report is FREE.

Yukon-Koyukuk design temps
Zone 8 compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Yukon-Koyukuk contractors who trust AutoHVAC