Blending safety and comfort, Wausau 4000i-DTFX fixed windows meet behavioral health project performance, daylighting and sustainability needs
Posted on February 11th, 2026 by Heather West

“Our behavioral care windows support evidence-based, human-centered, modern designs for improved outcomes,” said Eric Breidel, manager of architectural services at Apogee Architectural Metals. “These windows do much more than provide vital access to daylight and outdoor views. They also withstand human-impacts, and contribute to building energy-efficiency and sustainability goals. They help design and facility teams create calm and comfortable interiors, and present attractive exteriors welcomed by their surrounding communities.”
Saving time and labor in the field, Wausau 4000i-DTFX can be installed from either the interior or exterior, and are stackable. Durable, abrasion-resistant finishes make it easy to maintain the windows’ clean appearance and long-lasting functionality. These Wausau Window products are supported with an industry-leading warranty of up to 10 years.
Wausau DT Series and its custom-engineered psychiatric window systems are used by several state agencies and their architectural consulting partners. For example, the New York State Office of Metal Health (NYS-OMH) uses Wausau DT Series windows and references them in its Patient Safety Standards, Materials and Systems Guidelines, developed in association with Architecture+.
Human-impact tested
Wausau 4000i-DTFX fully fixed, aluminum-framed, AAMA AW Performance Class window meets the AAMA 501.8-23 Standard Test Method for Determination of Resistance to Human Impact of Window Systems Intended for Use in Behavioral Care Applications, a Fenestration and Glazing Industry Alliance (FGIA) document.
To pass AAMA 501.8-23, windows are “drop tested” for interior human impacts up to 2,000 foot-pounds, simulating the shoulder impact of a 200-pound person moving at 25 feet per second. Exterior impact testing also demonstrates resistance to simulated human impact and thrown objects, such as in courtyards and exercise areas.
Modern, energy-efficient designs
Creating modern facility designs, the new Wausau 4000i-DTFX windows are available in 4-inch and 4-5/16-inch frame depths with sleek sightlines. The windows’ mechanically fixed infill retainers accept a variety of security glazing.
A choice of architectural painted coatings, anodized finishes and specialty options are available through Linetec, Wausau’s single source solution for architectural finishing. In addition to environmentally responsible finishes, Wausau Window products have an Environmental Product Declaration (EPD) and can be specified with recycled aluminum to complement projects’ sustainability goals.
Complying with today’s energy codes and remaining resilient in extreme temperatures, Wausau 4000i-DT windows feature triple-glazed configurations and aluminum framing feature polyamide nylon thermal barriers. Indicative of their high performance, Wausau 4000i-DTFX windows deliver NFRC U-factors as low as 0.17 BTU/h·ft²·°F. The windows also have high condensation resistance with NFRC ratings as high as 42 and AAMA 1503 condensation resistance factors (CRF) as high as 67. Condensation resistance minimizes moisture on the interior. This reduces the opportunity for mold, supporting both cleanliness and healthy indoor air quality.
Safe and sound healing atmosphere
Calm, homelike interiors that balance security with care-appropriate amenities assist with patient treatment, recovery and outcomes, and the health and well-being of staff and visitors.
Offered as standard with triple-glazed configurations, Wausau 4000i-DTFX windows achieve high acoustic performance for quiet, therapeutic settings. Test reports list sound transmission class ratings as high as STC 47 and outdoor-indoor transmission class ratings as high as OITC 40.
Along with sound management, privacy is a concern in health care facilities. Wausau 4000i-DTFX windows can be specified with integral between-glass blinds to allow patient autonomy in managing privacy and shading. Blinds have occupant-controlled tilt designed for anti-ligature safety.
To learn more about Wausau Window DT Series behavioral care windows and other best-in-class aluminum-framed fenestration products, please visit https://apogeearchmetals.com or email healthcare@wausauwindow.com or call 877-678-2983.
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Filed under: Wausau, FGIA, Products, Linetec
