Oak Ridge, TN Climate Specs + Top-Rated Window Installers
ENERGY STAR groups Anderson County into its North-Central zone, the U-factor and SHGC target worth checking against any quote you get in Oak Ridge. Below that spec discussion sit 10 installers, their order set by Google rating, since Oak Ridge 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
4AIECC climate zone · ENERGY STAR North-Central zone
What zone 4A means for a Oak Ridge window
Knoxville, TN runs a January average near 38°F and climbs to about 78°F by July, a swing that adds up to roughly 3,732 heating degree days most winters, with 1,414 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Oak Ridge, separate from anything a brochure claims.
Zone 4A's requirement is the floor; Oak Ridge's specific load is what tells you whether beating that floor is worth the extra cost.
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 3.4 mi away.
Storm and weather risk around Oak Ridge
FEMA rates Anderson County's hurricane risk as Very Low and its wind risk as Relatively Moderate.
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 Oak Ridge home.
Ask specifically about design pressure and impact rating for Oak Ridge, not just energy performance, if either risk rating comes back on the high side.
- Hurricane
- Very Low
- 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 Oak Ridge 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.
10 top-rated window installers near Oak Ridge, TN
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.
- Smith Roofing & ExteriorsGoogle reviews
- American Home Design, Inc.Google reviews
- Window WorksGoogle reviews
- West Shore HomeGoogle reviews
- CRS ExteriorsGoogle reviews
- Window Depot KnoxvilleGoogle reviews
- Knoxville Window and DoorGoogle reviews
- American HomeGoogle reviews
- Hiwassee Window And DoorGoogle reviews
- Pella Windows and Doors Showroom of Knoxville, TNGoogle reviews