Slit Windows (ATIS)
Tostem Slit Windows (ATIS)
The Tostem Slit Window (ATIS) is a modern, high-performance aluminium window solution designed to provide natural ventilation, rain protection, privacy, and aesthetic appeal — all while maintaining the minimalistic and refined look that the ATIS series is known for. Unlike traditional windows, slit windows are narrow, high-positioned openings that admit air and light without compromising privacy or protection from rain.
What is a Slit Window (ATIS)?
The Slit Window (also referred to as an Awning Slit Window) in the ATIS product line is a specialised ventilation-focused aluminium window with a slender opening profile that tilts outward to allow airflow while keeping rainwater and direct views from outside at bay. It is ideal for spaces such as bathrooms, staircases, utility areas, or where a discreet ventilation solution is desired but full-sized windows may not be suitable.
Key Features
Slim, Elegant Design: Narrow frame and sleek profile that blends seamlessly into modern facades.
Rain-Protected Ventilation: High-mounted slit opening allows constant airflow even in light rain.
High-Quality Aluminium Construction: Durable and corrosion-resistant frames built to last.
Smart Insect Screen (Optional): Allows fresh air in while keeping insects out.
Effective Sealing: Good air tightness and water resistance due to precision engineering.
Multiple Colour Options: Available in finishes like Natural White, Silver, Grey, Black, Brown, etc.
Concealed Hardware: Clean look with minimal visible components.
Applications
The ATIS Slit Window is particularly suitable for:
Bathrooms and Washrooms: Fresh air without compromising privacy.
Stairwells and Hallways: Natural ventilation in circulation spaces.
Utility Areas: Kitchens, laundry rooms, or storage spaces needing airflow.
Contemporary Residences & Apartments: Enhances architectural character with functional ventilation.
Commercial or Hospitality Settings: Spaces where controlled ventilation and design aesthetics are essential.
Technical Specifications
| Specification | Tostem Slit Window (ATIS) |
|---|---|
| Frame Depth | 88 mm |
| Height of Sill | ~65 mm |
| Glass Thickness | 5 / 6 / 8 mm |
| Wind Pressure Resistance | JIS: 1200 Pa / ASTM E330: 2000 Pa |
| Water Tightness | JIS: 250 Pa / ASTM E330: 300 Pa |
| Air Tightness | JIS: 2.0 m³/h·m² / ASTM E283: 10.7 m³/h·m² |
| Noise Insulation | ~25 dB |
| Insect Screen | Smart Screen Available |
| Available Colours | White, Silver, Grey, Black, Brown, etc. |
Benefits – Why Choose Tostem Slit Window (ATIS)?
1. Continuous Ventilation
The slender, high-positioned opening promotes continuous airflow without needing full-sized windows, improving indoor air quality.
2. Effective Rain Protection
Designed to allow ventilation even during rain, the outward tilt and sealing keep interior spaces dry.
3. Optimal Privacy
High placement and narrow opening minimize direct views from outside — ideal for bathrooms or discreet spaces.
4. Aesthetic Integration
Sleek aluminium profiles and concealed hardware enhance building design without visual clutter.
5. Durable & Low Maintenance
Made from premium aluminium and engineered to resist corrosion and weathering, these windows are built for durability.
6. Energy-Efficient Performance
Good air tightness and sealing mechanisms help maintain comfort and can reduce energy costs.
7. Flexible Design Options
Multiple colours and finishes allow designers and homeowners to match architectural themes easily.
