Alitherm windows and doors have been designed to offer you a range of distinct advantages, with their stunning good looks, high performance, strength and durability.
The state of the art design offers reduced heat loss via a thermally broken frame with a polyamide bridge. The polyamide material has a high resistance to heat transfer from the inner face of the frame to the outer face of the frame. The technology minimises heat loss and delivers superb levels of thermal performance.
Strength and Durability are provided by the use of aluminium sections delivering structurally sound windows and doors for your peace of mind.

The Alitherm series of windows offers a range of high quality double & triple glazing options for side hung, top hung open out and parallel opening casements, suitable for both the residential and commercial markets.
This versitile range of profiles can provide many solutions such as traditional casement windows inspired by elegance and styling of timber products, or automatic parallel opening commercial windows designed to provide a balanced airflow in multi-storey commercial buildings.
All Alitherm profiles utilise Smart’s innovative polyamide thermal break technology which creates a barrier between the cold air outside and warm air inside. this technology significantly reduces thermal transmittance and enhances the overall U-value (W/m2K) of a products.
Alitherm products are available in a choice of standard or non-standard colours, including ,metallic, dual colour and the Smart’s unique Sensations range of textured finishes.
The series features the new Alitherm 300, Alitherm 600, Alitherm 700 and Alitherm 800 windows, designed to meet the exacting requirements of Document L 2010.