Twin Falls's Climate Data and Its Top-Rated Window Pros
ENERGY STAR groups Twin Falls County into its Northern zone, the U-factor and SHGC target worth checking against any quote you get in Twin Falls. Below that spec discussion sit 8 installers, their order set by Google rating, since Twin Falls is outside this site's window license file. A high rating is worth a look, not a finished decision.
Google Maps ratings checked · How we rank
5BIECC climate zone · ENERGY STAR Northern zone
Twin Falls's climate zone, in plain terms
Twin Falls falls in IECC climate zone 5B, and ENERGY STAR separately groups Twin Falls County into its Northern 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 Twin Falls.
A Twin Falls, ID 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 1.2 mi away.
What FEMA's risk data says about Twin Falls
Neither rating changes a window's energy label, but both are exactly what impact-resistance and design-pressure ratings are built to answer for a Twin Falls home.
Ask specifically about design pressure and impact rating for Twin Falls, not just energy performance, if either risk rating comes back on the high side.
- Strong wind
- Relatively Low
- Winter weather
- Relatively High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Twin Falls 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.
Twin Falls's top-rated window installers, by Google
The order below weighs a Google rating against its review count, the same way this site weighs a U-factor against a brochure claim: on the number, not the name. Treat it as a rating, never as proof of a license, bond or HVHZ approval.
- Pella Windows and Doors Showroom of Jerome, IDGoogle reviews
- Three BrothersGoogle reviews
- DaBellaGoogle reviews
- Fast Glass Inc.Google reviews
- Renteria Glass and Window, LLCGoogle reviews
- Twin Falls GlassGoogle reviews
- Nu-Vu GlassGoogle reviews
- Whitehead Home & EnergyGoogle reviews