“Energy efficient and beautiful - exactly what you are looking for.” - RG

If you asked us to name the most important home features, windows would top the list. Windows let light into your home and provide you with a spectacular view.
At Robert G. Miller, we know that only the highest quality windows are right for your home. We supply the industry’s most trusted windows, with high Energy Star ratings and even lifetime warranties.
With more than 60 years’ experience offering window installation, we are the right people to fulfill your window needs. We are large enough to offer a huge window selection but small enough to offer personalized service.
Explore our window selection below, and then call us for window installation in the Hanover, PA area and the Westminster, MD area.

ProVia Windows

img-9ProVia’s Endure, Aeris, Aspect, and Storm window product lines are custom built in Sugarcreek, Ohio, to your exact specifications by skilled craftsmen who serve by caring for details in ways others won’t.

ProVia’s Aeris Windows


  • ProVia’s premier window features pre-finished real oak, cherry, or maple wood applied to the sash and frame interior.
  • Four exterior color options, 16 interior stain finishes, and 16 interior paint finishes.
  • Optional grids are available in matching dual finishes.
  • Inspirations Art Glass for the ultimate in customization.
  • ComforTech Warm Edge glazing system.

ProVia’s Endure Vinyl Windows

  • Endure windows feature multiple color combinations, super durability, and multi-chambered frame and sash system, which provides leading-edge energy efficiency.
  • Four exterior color options with five interior colors including appealing laminated woodgrain.
  • Optional grids are available in matching dual finishes.
  • Inspirations Art Glass for the ultimate in customization.
  • ComforTech Warm Edge glazing system.

ProVia Aspect Vinyl Windows

  • Aspect windows feature a multi-chambered frame and sash system, providing excellent durability and ultimate energy efficiency.
  • Three standard frame color options.
  • ComforTech Warm Edge glazing system.

ProVia Aluminum Storm Windows


  • Town & Country
  • Concord
  • Valley Forge
  • Clinton

Sunrise Vinyl Windows

img-9Finely crafted detail and design for a beautiful view. Sunrise offers a selection of designer colors and options to enhance the beauty of your home.

The look of traditional windows without the maintenance.


  • More viewing visibility than other window.
  • 10 exterior colors and 8 interior finish options, including woodgrains.
  • Specialty options including blinds between the glass.
  • Lifetime non-prorated transferable warranty.

Wincore Vinyl Windows

Our New Construction Series

  • 400: A new construction product line with integral fin, the 400 Series features dimensional beveling on exterior frame for a traditional appearance.
  • 500: New construction product line with integral brickmould as well as an integral fin and J-channel. The added brickmould eliminates the need for additional trim accessories on brick or stone home installations.

Our Replacement Series

  • 7700: Flagship retrofit product line with a wide variety of decorative options for complete customization. Features a deeply beveled exterior frame and is available in a wide variety of styles.
  • 5400: Designed for remodeling applications, 5400 windows offer value and performance. Dimensional frames and a wide variety of window styles work well in any style of home.

Sunrise Windows

Sunrise Windows is one of the top manufacturers of energy-efficient, custom windows. These windows also offer premium performance, so you can seamlessly replace your windows and sliding doors. You can choose these windows in many colors and finishes to match your home’s style and your preferences.

We also install SunBlinds, a series of mini blinds that are sealed between glass panes so you never have to dust or clean them. Get in touch with our experts to learn more about these products or to ask about the non-prorated, lifetime warranty.

JeldWen Windows

Choose JeldWen Windows for the perfect combination of practicality and extravagance. Our Premium Vinyl windows come in many colors, sizes, and styles. The Builder’s Vinyl windows are incredibly affordable and energy efficient.

If you like the look of real wood, the W-2500 Wood windows are the best choice. They also work in any climate zone. For additional wood windows, look to our Traditional Plus Wood selection. Or, you can find specialty shapes or custom windows with the Siteline EX Wood and Custom Wood series.

Hylite USBlock Windows

Want to enhance your home’s privacy? Choose Hy-Lite’s Acrylic Block Privacy windows. These windows come pre-framed and are ready to install as soon as we arrive. You can use these windows for retrofit and new construction projects.

Trimline Windows

Energy-efficient custom aluminum clad wood and all wood windows

  • Clad Wood Replacement DR200
  • Clad Wood New Construction DR300
  • Liberty All Wood Windows
  • Historically Certified wood or clad windows
  • Ultra-Fit Sash Pac Sash Replacement System

Products available for sale but not installation:

Velux Skylights

Offering a variety of skylights, from fixed to solar powered, as well as the SunTunnel tubular skylight, Velux is committed to “bringing light to life.”


Enhance your home’s comfort and appeal by adding Solartube windows. Manufacturers use advanced engineering to bring you this smart, LED window system. It uses optical technologies and daylighting methods to make your home brighter—all with the power of the sun.

These windows are also more energy efficient than other options, so you can truly make your home as comfortable—and green—as you want.