The windows of this listed building on St James Place, Bath were fully restored thanks to FINEO vacuum glazing. To improve its thermal insulation, the existing sash boxes were repaired and fitted with FINEO combined with the installation of draught proofing. With a Uvalue of 0.7 W/(m².K) and the thinness of single glazing, FINEO appeared as the best solution to restore this listed building. Thanks to FINEO, the existing frames could have been preserverd while the thermal and acoustic comfort of the building were considerably improved.