Thermal Frame Casement, Awning & Hopper Series 450-T

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The Series 450-T is Fleetwood’s next generation operable window and is part of our elite Gen4 family. New technologies afforded our engineers the ability to design this window to provide more glass, a sleek cube design, an inherent shadow line, and improved energy efficiency. These exceptional traits are complemented with our proprietary Archetype hardware.

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Product Highlights


Design Notables


The 450-T was designed to reduce metal where possible, without compromising strength. The best example is the minimal approach in the exterior edge of the perimeter frame and the limited space around a hinged screen (HWS).

Shadow Line & Fixed Windows:

An added benefit to the ‘cube’ is a natural shadow line that traces the interior and exterior frame/vent junction. A petite sightline fixed window was designed to accompany the operable windows, which maintain the shadow line through the visual sweep of the elevation.

No Exposed Weep Slots:
Special attention was placed on hiding weep slots. The Series 450-T was designed to use the inherent shadow line as a full width linear drain, which avoids unsightly cuts, or weep covers.


Unique Traits

Flush Finish:

Each operable window was created to resemble a cube when closed. To achieve this purpose, the Engineering Department broke new ground and designed a vent that finished in true vertical alignment with the perimeter frame.

Cube Design:

The shape of the frame echoes classic Mid Century Modern design but enjoys modern technological advancements.

Concealed Hinges:

Casement windows can be ordered with optional concealed hinges (CCH/HAH), which come standard with the Archetype cam handle.

Hinged Screen:

When concealed hinges (CCH/HAH) are selected on a casement window, we provide a custom designed hinged screen (HWS) that is attached to the frame with Fleetwood designed stainless steel hinges.

Energy & Glass

Custom Strut:

Each Series 450-T is made with a custom formed thermal strut. Fleetwood designed the strut to allow the Engineering Department to fulfill the high expectation design notables

Convection Blockers:

Despite numerous advancements in technology, air is still the best window frame insulator – unless you have too much. Too much air space reduces its natural thermal benefit. The Series 450-T was created with ‘convection blockers’ to maximize the natural insulation of air.

Glass Choices:

The Series 450-T offers more glass choices than any other aluminum casement window in the luxury home market. This is made possible by the number of glass depth choices and the myriad of glass offered in the industry.

Massive Glass:

Insulated glass larger than 100 square feet is available in the Series 4800-T.


Exclusive American Hardware

Proprietary Cam Handle:

The Archetype cam handle (ACH) designed for the Series 450-T is the ideal balance of minimal design and ergonomics. It features a sleek and linear handle, complemented by a rectangular strike plate. All components are constructed from high-grade stainless steel and through careful design, all fasteners are hidden. Truly, it is more akin to jewelry than window hardware and is best appreciated to the fullest when seen in person.

Proprietary Multi Point Latch:

The Archetype multi point latch (AMP) was engineered for the Series 450-T as the perfect complement to the Archetype cam handle. Made from high-grade stainless steel and crafted with care, it is a work of art.

Proprietary Butt Hinges:

In order to achieve the cube design intent, we needed to create new butt hinges (ABH) for the Series 450-T casement windows. Similar to the Series 250-T hinges, an ideal balance of minimalism and strength were achieved.


Not Simply Screens

Extruded Frames:

Every Series 450-T screen frame is constructed of extruded aluminum to perfectly match the anodized finish of the window frames. Further, the inherent strength encourages decades of painless maintenance.

Minimal Attachment Clips:

The standard screen frame for Series 450-T operable windows is attached to the window frame with petite spring clips (ASC) designed and made by Fleetwood. Each clip is fashioned from stainless steel and allows easy removal of the screen frames for storing or cleaning.

Elite Luxury Mesh:

Fleetwood standard screens ONLY provide elite UltraVue screen mesh for as transparent an appearance as possible.


Archetype Window Hardware


 Archetype Cam Handle

  • Electropolished stainless steel
  • Hidden fasteners
  • Ergonomic design and operation

 Archetype Butt Hinges (ABH)

  • Electropolished stainless steel
  • Minimal profile and barrel diameter
  • Handles 200 lb+ vents.

 Archetype Multi-Point Latch (AMP)

  • Electropolished stainless steel
  • Hidden fasteners
  • Linear design and smooth operation



Product Features


Standard Features

Stock Anodized Finish: Black (Class 1) or Clear (Class 1)

1″ Insulated Glass with Dark Bronze Spacer
6063 T-6 Extruded Aluminum
Strut Thermal Barriers

3″ Deep Nail-on Frame
Stainless Steel Assembly Screws
Welded Corners & Bolster Key
1/2″ Height Aluminum Sill Pan

Proprietary Cast Stainless Steel Cam Handle (ACH) and Multi-Point
ch (AMP) (Casement & Awning)
Steel Single-Arm / Gear
Stainless Steel Concealed Hinges (HAH) (Awning)
Proprietary Stainless Steel Butt Hinges (ABH) (Casement)

Equal Sized Glass
“Cube” Design with Interior and Exterior Perimeter Shadow Lines
Frame and Vent Flush Finish
Exterior Snap-in Glazing (Square Profile Stop)
Extruded Screen Frame with UltraVue Mesh


Optional Features

(See CAD Details for more options)
Finish: 70% Kynar Paint and 50% if Black or Dark Bronze, Class 1 Custom Anodize (Light Bronze & Medium Bronze)
Glazing: 1-1/4″ & 1-3/4″

3″ Deep Equal Leg (Block) Frame
3″ Deep Unequal Leg (Block) Frame
Unequal Size Glass (TDL Alignment)
Steel Look SDL

Truth Stainless Steel Arm / Gear (For Roto Gear Hardware) (Casement & Awning)
Knob Handle (For Roto Gear Hardware) (Casement & Awning)
4-Bar Hinges (CCH/HAH) & Cam Handle (ACH) (Casement & Awning)
Black Painted Hardware Finish

Max Panel Width & Height

Max Panel Square Footage: 24ft2



C, CC, C/C, A, AA, A/A


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