Stevens, Washington HVAC Climate Zone

Stevens is located in IECC Climate Zone 6B (Cold - Dry). Get accurate Manual J load calculations with official design temperatures for Stevens.

Climate Zone
6B
Winter Design
-13°F
Summer Design
91°F
ZIP Codes
19

Stevens HVAC Contractors: Get Your Free Manual J Report

Climate Zone 6B requires precise load calculations. Upload your Stevens blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Stevens's exact design temperatures (-13°F winter / 91°F summer).

Claim Free Report
No credit card required

Verify Your Stevens ZIP Code

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

Stevens covers 19 ZIP codes: 99013, 99026, 99034, 99040, 99101, 99109, 99110, 99114, 99126, 99129 and 9 more

Stevens Design Temperatures

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

Winter 99% Design Temp
-13°F
Summer 1% Design Temp
91°F
Summer Wet Bulb
62°F

IECC Requirements for Zone 6B

Minimum insulation and window requirements for Stevens 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 Stevens

Heating Systems

Gas furnace (96%+ AFUE)
Boiler
Typical AFUE
96-98%

Cooling Systems

AC (13-14 SEER, often optional)
Typical SEER
13-14 SEER

Get Free Manual J Calculations for Stevens

Upload your Stevens blueprint and get a professional Manual J load calculation using official Zone 6B design temperatures. First report is FREE.

Stevens design temps
Zone 6B compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Stevens contractors who trust AutoHVAC