Bergsøe, Niels Christian

Jensen, Kasper Risgaard

Jensen, Rasmus Lund

Justesen, Rasmus Onsild

Nørgaard, Jesper

English

    Aalborg UniversitetInvestigation on Moisture and Indoor Environment in Eight Different Danish HousesJensen, Rasmus Lund; Jensen, Kasper Risgaard; Nørgaard, Jesper; Justesen, RasmusOnsild; Bergsøe, Niels ChristianPublication date:2011Document VersionAccepted author manuscript, peer reviewed versionLink to publication from Aalborg UniversityCitation for published version (APA):Jensen, R. L., Jensen, K. R., Nørgaard, J., Justesen, R. O., & Bergsøe, N. C. (2011). Investigation on Moistureand Indoor Environment in Eight Different Danish Houses. Abstract from The 9th Nordic Symposium on BuildingPhysics (NSB 2011), Tampere, Finland. http://webhotel2.tut.fi/nsb2011/General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.            ? Users may download and print one copy of any publication from the public portal for the purpose of private study or research.            ? You may not further distribute the material or use it for any profit-making activity or commercial gain            ? You may freely distribute the URL identifying the publication in the public portal ?Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access tothe work immediately and investigate your claim.Downloaded from vbn.aau.dk on: November 29, 2020Investigation on moisture and indoor environment in eight different Danish houses  For many years focus has been on reducing the energy need for heating in buildings. In existing dwellings this is often done by changing the windows and tightening the building. In new buildings air tightness are required leaving the mean part of the ventilation of the building in the hands of the occupants either by natural or mechanical ventilation. The increased focus on energy reduction is putting pressure on the requirements for fresh air. Together with the increased demands for comfort where draft from (natural)ventilation is unacceptable to most people there is an increased risk of lowering the indoor air quality and increasing the relative humidity that might leads to mould problems.  This paper describes an investigation of the indoor air quality, relative humidity and air change rate in eight different Danish dwellings all having problems with condensation on the windows. The dwellings where erected between 1930 and 2007. Some where only slightly renovated and others where completely renovated. Most where naturally ventilated.  In each house temperature, relative humidity and CO2 where measured in all primary rooms a long with the outdoor conditions. The total air change rate of the house where measured by passive tracer gas technique over a period of one to two weeks.  Based on the measurements the ventilation of the buildings was compared to the build regulation (air change rate), indoor air quality (CO2 level) and the use of the building (level of relative humidity). The results showed large variations between the eight houses but also between the three different measurements and thereby showing that the requirements in the Danish building regulations on fresh air as a function of the number of square metre can lead to both poor indoor air quality and high level of relative humidity but also to unnecessary energy use in the case where a large house are occupied by few people. An estimate on the moister production in the houses where made and compared to the values given in the literature. The moisture production in most houses where significantly higher than the values given in the literature.                  Keywords: moisture production, passive tracer gas technique, air change rate, condensation on windows   Rasmus Lund Jensen Kasper Risgaard Jensen, ph.d. stud, AAU Nano Jesper Nørgaard, Studmedhjælp Rasmus O. Justesen, Studmedhjælp Niels Christian Bergsøe, SBi 

Investigation on Moisture and Indoor Environment in Eight Different Danish Houses

https://vbn.aau.dk/ws/files/55231677/Investigation_on_Moisture_and_Indoor_Environment_in_Eight_Different_Danish_Houses.pdf

Investigation on Moisture and Indoor Environment in Eight Different Danish Houses

Abstract

Similar works

Full text

Available Versions

VBN