This thermally efficient range is ideal for those jobs where minimising cold and condensation is a priority.

ThermalHEART technology incorporates a glass fibre-reinforced nylon insulator or thermal break between the aluminium exterior and interior elements, resulting in windows and doors that are 35% (FIRST® Metro Series) and 20% (FIRST® Residential) more thermally efficient than standard double glazed products.

Released to meet new insulation requirements for homes, ThermalHEART is a high performance system for FIRST® Residential and FIRST® Metro Series, providing maximum energy conservation and interior comfort.