T450N Thermally-Broken Casement Window Unit — Single Operable

Blomberg T450N Single Casement Window — The Industry Benchmark for Ultra-Slim Thermally-Broken Aluminum Fenestration

Imagine waking up to a wall of glass so seamlessly integrated into your home's architecture that the boundary between inside and out nearly disappears. That's the promise of the Blomberg T450N Single Casement Window — a large-format, thermally-broken aluminum casement unit engineered to deliver the most uncompromising combination of slim aesthetics, thermal performance, and structural integrity available in the industry today.

With a 5/8" exterior sightline profile — the narrowest structural aluminum mullion available — the T450N Casement frames your view without interrupting it. Whether installed in a high-rise residential tower, a commercial curtain wall assembly, or a bespoke luxury single-family residence, this window unit performs at the highest level in every dimension.

Thermal Performance That Sets the Standard

At the heart of the T450N's thermal performance is a polyamide thermal-strut break — a precision-engineered structural insulator that separates the interior and exterior aluminum extrusion chambers, eliminating the cold-bridging that plagues conventional aluminum window systems. The result: a U-factor as low as 0.24 with dual glazing and an exceptional 0.16 with triple glazing, meeting or exceeding the most demanding energy codes in North America. Full ENERGY STAR and NFRC compliance is standard, not optional.

Hardware Engineered for Large-Format Panels

The T450N Casement is built to handle the demands of large-format glazing. Multi-point locking hardware engages simultaneously at multiple points along the sash perimeter, delivering consistent compression against the weather seal for an airtight, watertight closure. Concealed European-style hinges are rated to support panel weights exceeding 220 lbs, enabling expansive glass areas without visible hardware interrupting the sightline. The sash swings to a full 90 degrees of ventilation — wide open, effortlessly, every time.

Seamless Integration into the T450N Window-Wall Ecosystem

The T450N Casement integrates seamlessly with Blomberg's complete window-wall ecosystem — fixed lites, sliding units, pivot windows, and curtain wall assemblies — all sharing the matched 5/8" sightline for a continuous, uninterrupted glazed elevation. Customization options include Blomberg's 300+ proprietary extrusion program, specialty Low-E glass packages (dual and triple), and hardware finishes in Matte Black, Brushed Nickel, and Satin Bronze.

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