Manchester, CT: Climate Zone, Risk and Window Requirements
Local risk and climate data for Manchester, CT are below, translated into plain terms for a window buyer rather than left as raw codes. Use it to check a proposed spec before you sign, not just to browse.
Licenses checked · Connecticut Department of Consumer Protection
5AIECC climate zone · ENERGY STAR Northern zone
What zone 5A means for a Manchester window
Manchester falls in IECC climate zone 5A, and ENERGY STAR separately groups Capitol Planning Region 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 Manchester.
A Hartford-West Hartford-East Hartford, CT 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 7.4 mi away.
Storm and weather risk around Manchester
FEMA scores Capitol Planning Region's winter-weather risk as Relatively High and its flood risk as Relatively High.
Winter risk in Manchester 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 Manchester contractor, not one.
- Hurricane
- Relatively High
- Strong wind
- Relatively Moderate
- 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 Manchester 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 Manchester
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- American Windows & Siding LLCVerify license
- Window World Of Connecticut LLCVerify license
- Architectural Window CorporationVerify license
- Johns Roofing Siding & Windows LLCVerify license
- CT Window Replacement LLCVerify license