UPVC Double Glazing Ammanford / Rhydaman. Since our establishment back in 1994, MPN Windows serving Ammanford has supplied homeowners throughout the Carmarthenshire SA18 area with a superb selection of home-improvement products, including quality windows and doors in Ammanford. We’re recognised as one of the leading window companies in Ammanford and the surrounding area. At MPN Windos, we strive to always put the customer first, ensuring our products fulfil as wide a range of aesthetic and practical desires as possible.