The Collegiate Church of Notre-Dame-en-Vaux improves its energy efficiency by up to 25% with Hellio

Par Bat info source: Hellio via YouTube

Welcome to Châlons-en-Champagne, to the magnificent Collegiate Church of Notre-Dame-en-Vaux, built in the 11ᵉ century and labeled a UNESCO World Heritage Site. This historic place which, like many heritage buildings, displays poor energy performance with regard to the difficulties of insulation and the high energy consumption required.