Alitherm 400 Tilt and Turn Windows

Alitherm 400 tilt and turn windows are a premium solution for projects that require flexibility, energy efficiency, and modern styling. Designed by Smart and manufactured in-house by Direct Trade Windows, this system offers dual opening functionality—tilting inwards for secure ventilation or turning fully open for easy cleaning and maximum airflow. With a softline frame and thermally broken aluminium profiles, these windows deliver outstanding performance in both residential and commercial settings.

Fully compliant with Document L 2022 and PAS24 security standards, Alitherm 400 tilt and turn windows combine slim sightlines with advanced engineering. Available in a wide range of colours, finishes, and glazing options, they are built to order and tailored to your project’s needs. Whether you’re specifying for a new build or upgrading a high-spec renovation, these windows offer exceptional functionality without compromising on style or thermal efficiency.

Key Features:

• Dual-function opening: Tilt for ventilation or turn for full opening access
• Thermally efficient: Polyamide thermal break for low U-values and reduced energy costs
• Modern profile: Softline design with slim sightlines for a sleek finish
• Security tested: PAS24 compliant with robust locking mechanisms
• Custom finishes: Choose from hundreds of RAL colours, including dual colour and textured coatings
• In-house manufacturing: Built to order with expert support and fast lead times