127 Series – Slim Casement Window

Architectural refinement, ultra-narrow sightlines

U-Factor (W/(m²·K)) 0.274SHGC 0.179VT 0.288
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127 Series – Slim Casement Window

Experience architectural refinement with the 127 Series Casement Window. Engineered for superior thermal performance, this system features advanced Low-E glass configurations, achieving an NFRC U-Factor of 0.274 Btu/(h·ft²·°F) with triple glazing. It combines minimalist aesthetics and uncompromising climate control—designed for luxury residences and modern architectural projects that demand elegance and passive-house levels of efficiency.

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Related: 80 Series – Casement Window · 80 Series – Fixed Window

The Art of Modern Fenestration

The 127 Series Casement Window is a meticulously crafted architectural instrument. In high-end contemporary architecture, the demand for visual purity must be balanced with unyielding environmental performance. Using state-of-the-art aluminum extrusion technologies, we have created a casement window that transforms how living spaces are experienced. The ultra-narrow frames are precision-extruded to be as unobtrusive as structurally possible, maximizing the expansive glass surface area so the focus remains on the panoramic views outside.

Uncompromising Thermal Performance

At the core of the 127 Series lies an advanced thermal management system. Depending on your geographical requirements and building codes, it offers highly optimized glass configurations that redefine energy efficiency standards in luxury fenestration.

Architectural Aesthetics & Purity

Visually, this window is a testament to the “less is more” design philosophy. Despite its heavy-duty thermal layers, the window maintains a Visible Transmittance (VT) of 0.288, allowing a carefully calibrated amount of natural, glare-free sunlight to illuminate interior spaces. The exterior aluminum profiles feature premium architectural-grade powder coatings that resist fading, scratching, and severe corrosion—even in harsh coastal environments.

Precision Engineering & Security

Beyond insulation, the 127 Series excels in mechanical reliability. Precision-engineered, European-style multi-point locking hardware compresses the sash tightly against continuous, high-grade EPDM weather-stripping seals. The result is a continuous air- and water-control layer that prevents microscopic drafts and moisture ingress while shielding interiors from urban noise.

The Ideal Solution for Visionary Projects

Engineered for those who refuse to compromise, the 127 Series is the ideal fenestration choice for custom-built luxury villas, boutique hotels, and eco-conscious developments—an investment in lifelong thermal comfort, structural integrity, and timeless architectural aesthetics.

The Triple Glazing Low-E variant is a masterpiece, achieving an extraordinarily low U-Factor of 0.274 Btu/(h·ft²·°F). The low value helps limit heat transfer and maintain a stable indoor climate year-round. For less extreme climates, the Double Glazing configuration delivers a NFRC U-Factor of 0.379 Btu/(h·ft²·°F). The triple-glazed model also has a Solar Heat Gain Coefficient (SHGC) of 0.179, effectively blocking scorching solar radiation and lowering HVAC expenditures.

Glazing ConfigurationNFRC U-Factor (Btu/(h·ft²·°F))SHGCVT
Triple Glazing0.2740.1790.288
Double Glazing0.379--

Values shown are NFRC performance data for the listed glazing configurations. Final ratings depend on project-specific sizes and glazing packages.

Every VITRIUS system is factory-fabricated to project-specific dimensions in our Chino, California facility, then laser-calibrated and pressure-tested before shipment. On site, the units install as complete, pre-assembled systems - reducing labor, error, and schedule risk.

  • Factory-fabricated, pre-assembled units reduce on-site labor
  • Laser-guided calibration and multi-point pressure testing before shipment
  • Installation drawings, hardware schedules, and torque specs included
  • On-site technical support available for authorized installers
  • After-sales lifecycle support via the Window Perfect portal
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