What Van Nuys Homes Need From a Replacement Window

ENERGY STAR groups Los Angeles County into its South-Central zone, which is the U-factor and SHGC target worth checking against any quote you get in Van Nuys. The longest-licensed window contractors based in Van Nuys are listed below the climate data.

Licenses checked September 30, 2026 · California Contractors State License Board

3BIECC climate zone · ENERGY STAR South-Central zone

What zone 3B means for a Van Nuys window

Moisture and glass performance are handled by different parts of a window's spec sheet, and a Van Nuys buyer benefits from checking both instead of assuming one implies the other.

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 0.8 mi away.

Storm and weather risk around Van Nuys

FEMA scores Los Angeles County's winter-weather risk as Relatively Moderate and its flood risk as Very High.

Winter risk in Van Nuys 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 Van Nuys contractor, not one.

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 Van Nuys 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 Van Nuys

Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.

Anco Glass INCWindow and glass contractor · licensed 43 years · 91406Verify license
Wholesale Glass & Supplies INCWindow and glass contractor · licensed 36 years · 91406Verify license
Coordinated Glass Systems INCWindow and glass contractor · licensed 33 years · 91411Verify license
Crabtree Glass Company INCWindow and glass contractor · licensed 32 years · 91409Verify license
Miracle Masters Glass COWindow and glass contractor · licensed 31 years · 91405Verify license
Valley National Glass INCWindow and glass contractor · licensed 31 years · 91411Verify license
Dave's Glass & MirrorWindow and glass contractor · licensed 27 years · 91405Verify license
Madix Glass INCWindow and glass contractor · licensed 22 years · 91406Verify license
Glass & Mirror Solutions INCWindow and glass contractor · licensed 18 years · 91406Verify license
Brightside GlassWindow and glass contractor · licensed 14 years · 91406Verify license
Panorama Glass CorporationWindow and glass contractor · licensed 9 years · 91402Verify license
A M B Glass CorpWindow and glass contractor · licensed 9 years · 91406Verify license

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