Column Bernd Karstenberg: deel 40, over energie impact bouw en installaties bij isolatiewaarde gevel of glas
27 maart 2023
Bernd Karstenberg is directeur van Life Cycle Vision. Voor de NVBK (en deze Kostenpost) schrijft hij columns, die ook in de kennisbank terug te vinden zijn. Dit keer gaat zijn column over de noodzaak van integraal ontwerpen op levensduurkosten en dan specifiek over energie impact bouw en installaties bij isolatiewaarde gevel of glas (deel 40).
In de onderstaande analyse is of alleen de Rc waarde verbeterd (bij gelijkblijvende U waarde glas) of de U waarde verbeterd (bij gelijkblijvende Rc waarde gevel). In de onderstaande analyse is duidelijk dat de impact op glas vele malen groter is dan om van de gevel de Rc waarde te verbeteren. Daarnaast is boven de norm isoleren/beter glas nauwelijks impact heeft op de waarde van de kWh/m2bvo. Dus bij grootschalige renovatie is de eerste focus het toepassen van beter isolerend glas.
Om de mate van impact aan te geven volgt hieronder een korte analyse, waarbij van referentiegebouwen met verschillende isolaties van gevel en glas de energie impact zijn berekend.
>> Lees hier de hele column van Bernd (pdf).
>> Bekijk in de kennisbank zijn andere columns
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