What Pomona Homes Need From a Replacement Window
Pomona sits in IECC climate zone 3B, which sets the energy-performance bar for any window installed here. Below that, a short list of Pomona's longest-licensed window contractors can turn a spec into an actual installed window.
Licenses checked · California Contractors State License Board
3BIECC climate zone · ENERGY STAR South-Central zone
Pomona's climate zone, in plain terms
Pomona falls in IECC climate zone 3B, and ENERGY STAR separately groups Los Angeles 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 Pomona.
A Los Angeles-Long Beach-Anaheim, 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 1.6 mi away.
What FEMA's risk data says about Pomona
Los Angeles County's hail risk sits at Relatively Moderate and its wildfire risk at Very High, according to FEMA's National Risk Index.
Hail risk matters for glass and screen durability in Pomona; wildfire risk matters more for the frame material and nearby vegetation than for the glass itself.
Either way, it's a reasonable question to bring to a Pomona installer before you settle on a product line.
- Strong wind
- Relatively Moderate
- Winter weather
- Relatively Moderate
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Pomona 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.
Pomona's longest-licensed window installers
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Spectra CompanyVerify license
- Pasco DoorsVerify license
- Palacio Home ImprovementVerify license
- R C GlassVerify license
- Total Glazing Solutions INCVerify license
- P M E Window InstallationVerify license
- DK Glass And Mirror INCVerify license
- Precision Windows And GlassVerify license
- Payless Glass Services INCVerify license
- Goliath Glazing INCVerify license
- Al And Sons Construction LLCVerify license