Texas summers are hard on a home, and old windows let that heat pour right in. Energy efficient windows with Cardinal Low-E glass stop up to 82% of the sun’s heat at the glass, so your rooms stay comfortable, your AC finally catches up and your cooling bills come down. Custom made for your openings and backed by Pella engineering, these are windows built for the way Texas really feels in August.
Updated November 2026
FGIA Certified Window Installation CompanyFind out what new windows will do for your home. Schedule your in-home consultation and get an itemized proposal.
Beat the heat with windows that keep the sun’s heat outside where it belongs. Call or text us at (972) 768-1999, or see what energy efficient windows cost for your home.
New windows do more than lower your energy bill. They change the way your whole home looks from the street. Clean, modern frames and clear Low-E glass replace tired, builder-grade windows and give your home a fresh, finished look that instantly improves its curb appeal.
Choose classic white or almond for a timeless look, or bold black vinyl windows for a modern one. Inside, you get quieter rooms, brighter light and windows that open with one hand.
The comfort you feel inside, and the look you see from the driveway.
Texas heat is not ordinary heat, and your glass decides how much of it gets inside. Here is what DFW summers look like, and how much of the sun’s heat comes through clear glass compared with Cardinal Low-E.
A quick look at how energy efficient windows keep Texas heat out of your home, and what to look for in the glass before you buy.
We specialize in Burris and Pella windows, both backed by Pella engineering. Burris TectView windows are custom made in Fort Worth, so you get custom windows built to your exact openings, not stock sizes off a shelf. These double pane vinyl replacement windows come with the full Cardinal Low-E glass lineup. Pella Impervia is the fiberglass replacement windows choice for homes that want a fiberglass frame, with Pella InsulShield Low-E glass.
Pick the glass for your sun. Low-E 366 blocks 73% of the sun’s heat, 340+ blocks 82% and Quad 452+ blocks 78% with a fourth Low-E layer for whole-home comfort. Every option blocks 95 to 99% of the UV rays that fade floors and furniture.
Also see: Low-E glass packages · Sliding patio doors
We measure every opening precisely and install energy efficient replacement windows that seal tight and stay that way. If your rooms run hot, your AC never shuts off or your glass has gone foggy, your windows are working against you.
Every window is backed by the manufacturer’s limited lifetime warranty, with our own workmanship warranty on every installation.
Based in Plano? Learn more about our Plano window replacement services.
FGIA certified, so your windows perform the way they were built to. Optimal Windows is an FGIA Certified Window Installation Company, which means every window we install goes in to a national installation standard, not just the way an installer happened to learn on the job. That matters because a window’s energy rating only holds up when the frame is sealed tight to the opening, so the savings you pay for actually reach your cooling bill.
From there, the rest is simple. Our salespeople are never on commission. Every project starts with an in-home consultation and ends with an itemized proposal, so you know exactly what you are getting and what you are paying for, and every window is backed by the manufacturer’s limited lifetime warranty plus our own workmanship warranty.
| Big-Box Store | High-Volume Installer | Our WayOptimal Windows | |
|---|---|---|---|
| Who you meet | A store rep, then a sales visit | A commissioned salesperson | A window expert, never on commission |
| Pricing | Package pricing, add-ons later | Today-only discounts | Itemized proposal, no pressure |
| Who installs | Subcontracted crews | Crews paid by the job | Installed to FGIA standards |
| Certification | Varies by subcontractor | Varies | FGIA Certified Installation Company |
| After the job | Call the store | Call the call center | One call to Optimal Windows |
Comparison reflects typical industry setups. Individual companies vary.
Recent projects showcasing professionally installed, energy-efficient windows in a variety of home styles and settings.
The most efficient windows pair a tightly sealed frame with Low-E glass made for your climate. For Texas heat, Burris TectView windows with Cardinal Low-E 340+ glass block 82% of the sun’s heat, and Quad 452+ adds a fourth Low-E layer for whole-home comfort. Pella Impervia fiberglass windows with Pella InsulShield Low-E glass are a premium option. We help you choose the right glass for your home at your in-home consultation.
Most homes pay between $700 and $1,500 per window installed, depending on window size, style and the glass package. We measure every opening at your in-home consultation and give you an itemized proposal that lists the price of each window. For a quick price range on Burris windows, use our online estimate.
Your savings depend on your home, your current windows and the glass package you choose. Low-E glass stops most of the sun’s heat before it reaches your rooms, so your AC runs less through a Texas summer, and it blocks 95 to 99% of the UV rays that fade floors and furniture. Homeowners replacing original builder-grade windows often feel cooler rooms from the very first summer.
Yes. They lower cooling costs, make every room more comfortable, protect floors and furniture from fading, quiet outside noise and refresh the curb appeal of your home. With custom Burris or Pella windows and an FGIA Certified installation, you get windows built to perform for years.
Energy efficient windows are built to stop heat from passing through the glass and frame. They pair double pane glass with a Low-E coating that reflects the sun’s heat, an insulating gas fill between the panes and a tightly sealed frame. In Texas, the right Low-E glass matters most, because it blocks the sun’s heat before it reaches your rooms.
Yes. Double pane windows with Low-E glass meet ENERGY STAR requirements for the South-Central climate zone that covers DFW, which calls for a U-factor of 0.28 or lower and a solar heat gain coefficient of 0.23 or lower. Cardinal LoĒ³-366, LoĒ³-340+ and Quad LoĒ-452+ all meet that standard in a double pane window.
Not for windows installed in 2026. The federal Energy Efficient Home Improvement Credit, which covered up to $600 for qualifying windows, ended for windows placed in service after December 31, 2025. Energy efficient windows still pay you back every month through lower cooling bills. For advice on your own taxes, check with a tax professional.
Curious what new windows will cost? Get a price range for Burris windows online in about a minute, or book an in-home consultation and we will measure every opening, walk you through frame and glass options, and build an itemized proposal for your exact windows. Call (972) 768-1999 or send us a message.
Clear Expert Guidance.
5760 Legacy Dr B3366, Plano, TX 75024
Monday - Friday: 24 Hours
Saturday - Sunday: Closed
We respect your time and never use high-pressure sales tactics
