User talk:BoRohde

Welcome to Wikimedia Commons, BoRohde!

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-- Wikimedia Commons Welcome (talk) 11:58, 18 December 2020 (UTC)

Trykprøvning af bygninger, blower door

Trykprøvning af bygninger omtales ofte som en blower door test. I Danmark skal nybyggeri være lufttæt hvilket er en meget vigtig parameter ikke mindst for at spare energi, men også undgå fugt i konstruktionen som kan føre til skimmel.

— Preceding unsigned comment added by BoRohde (talk • contribs) 09:10, 25 August 2021 (UTC)

Under udførelsen af en blower door test erstattes typisk hoveddøren med en blower dooren som med en blæser opbygger et tryk på 50 Pa i bygningen. På baggrund af luftmægden blower dooren flytter samt bygningsdata udregnes utætheden per kvadratmeter . I Danmark er kravet til tæthed beskrevet i bygningsreglementet,

Lækagesøgning udføres hvis tætheden ikke er tilstrækkelig. Det drejer sig ofte om ikke korrekt udført dampspærre typisk ved vinduer eller installationer der gennembryder klimaskærmen. I praksis er der to metoder der bliver anvendt ved lækagesporing. Et; Der laves undertryk i bygningen og med termografi lokaliseres der hvor kold luft trækker ind. Ved denne metode er det en forudsætning at udetemperaturen er væsentlig under indtemperaturen. To; Der laves typisk overtryk og bygningen fyldes med røg hvorefter man se hvor røgen kommer ud.