Eugene, Oregon HVAC Climate Zone

Eugene is located in IECC Climate Zone 4C (Mixed - Marine). Get accurate Manual J load calculations with official design temperatures for Eugene.

Climate Zone
4C
Winter Design
29°F
Summer Design
85°F
ZIP Codes
6

Eugene HVAC Contractors: Get Your Free Manual J Report

Climate Zone 4C requires precise load calculations. Upload your Eugene blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Eugene's exact design temperatures (29°F winter / 85°F summer).

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Verify Your Eugene ZIP Code

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

Eugene covers 6 ZIP codes: 97401, 97402, 97403, 97404, 97405, 97408

Eugene Design Temperatures

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

Winter 99% Design Temp
29°F
Summer 1% Design Temp
85°F
Summer Wet Bulb
67°F

IECC Requirements for Zone 4C

Minimum insulation and window requirements for Eugene per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-19
Window U-Factor:0.32
Window SHGC:0.4

Energy Code: 2021 IECC

Recommended HVAC Equipment for Eugene

Heating Systems

Gas furnace
Heat pump
Typical AFUE
92-95%

Cooling Systems

AC (optional)
Heat pump
Typical SEER
14 SEER

Get Free Manual J Calculations for Eugene

Upload your Eugene blueprint and get a professional Manual J load calculation using official Zone 4C design temperatures. First report is FREE.

Eugene design temps
Zone 4C compliant
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