Window Climate Specs for San Bernardino, CA
ENERGY STAR groups San Bernardino County into its South-Central zone, which is the U-factor and SHGC target worth checking against any quote you get in San Bernardino. The longest-licensed window contractors based in San Bernardino are listed below the climate data.
Licenses checked · California Contractors State License Board
3BIECC climate zone · ENERGY STAR South-Central zone
What zone 3B means for a San Bernardino window
San Bernardino falls in IECC climate zone 3B, and ENERGY STAR separately groups San Bernardino County into its South-Central zone for window certification.
Those two numbers, not the brand on the box, set the U-factor and SHGC worth checking on any quote you get in San Bernardino.
A Riverside-San Bernardino-Ontario, CA contractor who can't name either one on request is worth a second question before you sign.
Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 9.2 mi away.
Storm and weather risk around San Bernardino
FEMA scores San Bernardino County's winter-weather risk as Relatively Low and its flood risk as Very High.
Winter risk in San Bernardino weighs on U-factor and condensation resistance; flood risk weighs more on sill height and drainage detailing than on the glass package.
Treat these as two separate conversations with a San Bernardino contractor, not one.
- Strong wind
- Relatively High
- Winter weather
- Relatively Low
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before San Bernardino window bids come in
- How to Read an NFRC Window Label Four numbers on one sticker decide most of a window's real-world performance. Here's what each one means.
- ENERGY STAR Window Criteria by Climate Zone ENERGY STAR splits the country into four zones, each with its own numbers. Here they are, and why the Northern zone works backward from the other three.
- Impact Windows vs. Shutters in Florida's Hurricane Zones Florida gives homeowners two paths to a protected opening. Here's how each one is tested, and where the HVHZ raises the bar further.
Window installers with the longest license records in San Bernardino
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Rondy's Glass ServiceVerify license
- Inland Empire GlassVerify license
- Rondy's Construction INCVerify license
- B J's Glass & MirrorVerify license
- Genesis Glass Installations INCVerify license
- Doug Valko Window ServiceVerify license
- North Glass And Glazing Service INCVerify license
- FB Glass INCVerify license
- JC Glass ServiceVerify license
- Stephanie's WindowsVerify license
- NV Glass Windows & DoorsVerify license
- Supreme GlazingVerify license