
Thermally Broken Hopper with Fixed Window
Style: TB 4300
Live large and bring natural illumination into your space with Portella fixed windows. Allow the outdoor light to stretch into any space from a dull stairway to a dark hallway. Or transform a large wall into a breathtaking vista. Choose from a variety of geometric shapes, sizes and colors that are beautiful, airtight and energy efficient. Use them in combination with other Portella windows and doors to create a custom configuration.

Thermally Broken Hopper with Fixed Window
Style: TB 4300
- NFRC rated Thermally Broken
- Carbon Steel (Stainless Steel, CorTen, and Bronze available)
- Precision cold formed profiles with “stepped leg” design
- High density cast in polyurethane thermal barrier
- Double glazed (single and triple available)
- Glass: Cardinal 366/Argon/Clear tempered (other glass options available)
- Glazing Orientation: Exterior Wet Glazed
- True divided lite construction with 1 ¼” muntin bars
- Hinges: Adjustable steel post in barrel w ball bearing
- Window Lock: Latch sash lock
- Window Operation: Stay bar or Roto crank
- Available in standard and custom paint options: grey, pewter, gun metal, chestnut brown, dark bronze and black
- Continuous steel mounting flanges with orientation options
- Minimum size 24” width x 12” height + transom
- Maximum size 72” width x 96” height + transom

Finishes
Pewter
Gun Metal
Grey
Brown
Dark Bronze
Black
Hardware
Roto Operator
How to Order
All Portella products are custom made to your exact specifications. Contact us today to be connected to your personal Project Manager. We’ll need overall sizes and details of what you’re looking for and your location to determine which product will work best in your climate and meet your state’s regulations. Click here for details.