One of this year's theme at Batibouw are Almost Energy-Neutral buildings or BENs. That is what Europe is expecting of all new European buildings by 2021. The Brussels region is one of the best performers in this area with her 'Passive 2015' legislation. Which imposes strict rules for insulation, ventilation and airtightness. But what exactly the 'Passive 2015' legislation stipulates remains unclear for some.
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