Mulled Window Systems
Many applications, both residential and commercial, utilize doors, windows, and curtain walls in a single unit. There are many limitations, restrictions, and sizes that produce results that look uniform, but lack quality. Solar Innovations® offers a window and door system that combats these issues and provides customers with a well designed, quality product.
The Mulled Window and Door System has been designed to maximize flexibility by joining a series of operable windows and swing doors to create one cohesive system without additional rafters or framing, while maintaining consistent, minimally interrupted site lines. Solar Innovations, Inc. is proud to manufacture one of the most flexible window wall systems available in the industry today.

Window Integration
Flexibility is one of the distinguishing factors of any Solar Innovations®. product. This system allows end users to make unique selections and provides flexibility in design by integrating awning, casement, hopper, fixed, tilt turn, and egress windows (depending on local code) all within the same unit. These systems create a modern, sleek, customizable option for any project.
Door Integration
Solar Innovations® mulled window system allows the combination of as many doors and windows as desired, without the need for additional framing. Units typically stay below 12’ in height, but can be as wide as the customer desires. The 4-inch site line system creates a modern, sleek, and customizable option for any project. Single terrace doors and French doors are capable of integration into the same system.
Coastal Applications
Our systems have the option to be both coastal and non-coastal. Because we use stainless steel hardware, our materials withstand the corrosive effects of the elements in these coastal regions.
Custom Engineered
Each Solar Innovations® system is custom made to order based on your project needs and preferences. Therefore, our team of engineering experts has you covered.
Sustainable Products
Solar’s products are manufactured with outstanding thermal performance, durable framework, and sustainable materials, therefore, making it a great option for your next project.
Glass Variety
Solar Innovations ® has top of the line glazing solutions which include laminated, dual glazed, triple glazed, in addition to our marine glazed options just to name a few.

In-swing & Out-swing Options
Another exclusive feature Solar Innovations® provides to customers is the ability to select both in-swing or out-swing windows within the same system, unlike many competitors’ systems which can accommodate only one option. In-swing and out-swing terrace doors, with ADA compliant sills, can be built into the window system. Fixed transoms can also be added to these systems over both windows and terrace doors. This level of customization allows designers to create a unique system for any application.
The Mulled Window System can be a combination of fixed panels and operable windows in one unit. Solar Innovations®’ Mulled Window system can be composed of any number of fixed, awning, hopper, and casement windows. Unlike the systems of many other manufacturers, Solar’s window system can include both inswing and outswing windows in one structure, creating a truly unique and customizable system. The Mulled Window system is also NFRC certified. Customization of product profiles, hardware, sills, panel size, and testing can be completed upon request.
SPECIAL FEATURES |
UNIT TYPE OPTIONS |
Water performance, up to 15 psf, depending upon configuration and water column | In-system frame flanges, snap-in nailing fins, or slide on nailing flanges |
Thermally enhanced utilizing thermal strut | Decorative interior & exterior grids |
Operable hardware custom manufactured by Solar Innovations® | Fixed mesh insect screens |
Systems include fixed, casement, awning, tilt turn, tilt slide, hopper and egress windows | Custom finishes: |
Multiple hardware styles and finishes | Powder coat finish: AAMA 2604-2605 |
Accommodates monolithic and insulated glazing infills from 3/16″ to 1 1/2″ | Fluoropolymer (50% or 70%): AAMA 2604-2605 |
Consistent sightlines within system | Veneer and cladding options |
AAMA 2603 Standard Finishes: Hartford Green, Bronze, Black, Natural Clay, White, Sandstone |
Dual color or dual finish options |
Class I Anodized: Dark Bronze, Clear | Multiple sill designs, including ADA compliant ramps |
LEED friendly system including recycled conte | Designed to accommodate almost any monolithic, insulated, and laminated |
Maximum size dependent upon engineering requirements |
Paint
STANDARD – AMMA 2603*
SI Black
SI White
SI Sandstone
SI Natural Clay
SI Bronze
SI Hartford Green
Powder Coat Solids
STANDARD – AAMA 2605§
SI Black
FRSL 11618
SI White
FRSL 83247
SI Sandstone
FRSL 46647
SI Natural Clay
FRSL 47591
SI Bronze
FRML 97138
SI Hartford Green
FRSL 32872
Anodized
Additional cost
Class 1 Clear Anodized
Dark Bronze Anodized
Powder Coat Solids
PREMIUM – AAMA 2605§
Black
FRSL 11390
Apollo White
FRSL 82908
Bone White
FRSL 82909
Ivory
FRSL 46646
Charcoal
FRSL 74654
Military Light Blue
FRSL 21709
Burgundy
FRSL 62496
Hartford Green
FRSL 32872
Sandstone
FRSL 46647
Seawolf
FRSL 46645
Fashion Gray
FRSL 74652
Colonial Gray
FRSL 74653
Antique Bronze
FRSL 46648
Wood Veneering (Unfinished)
STANDARD¶
Douglas Fir
White Oak
Walnut
Honduran Mahogany
Wood Veneering (Unfinished)
DESIGNER¶
Ponderosa Pine
Pecan Pine
Cherry
NOTE: WOOD VENEERING IS FOR INTERIOR APPLICATIONS ONLY. AVAILABLE ON A LIMITED BASIS DUE TO VENDOR SUPPLY.
Wood/Glulam
STANDARD¶
Red Oak
White Ash
Walnut
White Oak
Wood/Glulam
DESIGNER¶
Douglas Fir
Cherry
Sapele Mahogany
Walnut
*5 year warranty (finishes available while in stock).
†5 year warranty. Scratch & fade resistant; contains no VOCs.
‡Dependent on shelf life, some AAMA 2604 & 2605 finishes may be unavailable; Hartford Green is being phased out.
§10 year; up to 20 year warranty. Scratch & fade resistant; contains no VOCs.
¶Adds one to three weeks to lead time.
PLEASE NOTE: Depending upon color selection, extra cost and lead times may apply for all finishes other than Solar Innovations® stock standards. Color illustrations are shown as accurate as standard photography and printing processes allow. Final finish selection should be made from a physical sample; please contact Solar Innovations® to receive samples. All product and finish options are subject to vendor availability. Solar Innovations® reserves the right to discontinue any option at any time without notice. Additional options, including custom color matches, are available; contact a Solar Innovations® sales designer for details.