SMARTS Alitherm Heritage 47 Aluminium Door with Side Panel Professionally installed by AJ Windows and Doors near Canterbury, Kent. Designed to combine timeless heritage styling with modern performance, the SMARTS Alitherm Heritage 47 system features slim aluminium sightlines, excellent thermal efficiency and high-security locking. It's an ideal choice for both period and contemporary homes, offering the classic steel-look aesthetic with all the benefits of modern aluminium. ✔