Union, Oregon HVAC Climate Zone

Union is located in IECC Climate Zone 5B (Cool - Dry). Get accurate Manual J load calculations with official design temperatures for Union.

Climate Zone
5B
Winter Design
-7°F
Summer Design
91°F
ZIP Codes
7

Union HVAC Contractors: Get Your Free Manual J Report

Climate Zone 5B requires precise load calculations. Upload your Union blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Union's exact design temperatures (-7°F winter / 91°F summer).

Claim Free Report
No credit card required

Verify Your Union ZIP Code

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

Union covers 7 ZIP codes: 97824, 97827, 97841, 97850, 97867, 97876, 97883

Union Design Temperatures

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

Winter 99% Design Temp
-7°F
Summer 1% Design Temp
91°F
Summer Wet Bulb
63°F

IECC Requirements for Zone 5B

Minimum insulation and window requirements for Union per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-30
Window U-Factor:0.3
Window SHGC:0.4

Energy Code: 2021 IECC

Recommended HVAC Equipment for Union

Heating Systems

Gas furnace (95%+ AFUE)
Typical AFUE
95-98%

Cooling Systems

AC (13-15 SEER)
Typical SEER
13-15 SEER

Get Free Manual J Calculations for Union

Upload your Union blueprint and get a professional Manual J load calculation using official Zone 5B design temperatures. First report is FREE.

Union design temps
Zone 5B compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Union contractors who trust AutoHVAC