Distinct Architectural Appeal & Excellence in Comfort. Thermaline^® EcoCasement System is a thermal barrier aluminium casement system which is specifically designed to meet the demand for an outward opening window with very slim profiles and to provide maximum thermal & acoustic insulation. Its 75mm face width and 55mm frame depth make it one of the sleekest casement window in its industry. Thermaline^® EcoSeries Casement System allows for maximum daylight access, features excellent weather resistance and optimal insulation. With 3 circumferential sealings, EcoSeries Casement windows keep out noise, dust, wind, and rain. High levels of burglar-proof security can be achieved by using multi-point locking with safety glass.