R-values, humidity and health : case studies from Auckland Wellington
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Su, Bin
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2017-05
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Conference Contribution - Oral Presentation
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Auckland (N.Z.)
building envelope
indoor health
insulation
houses
relative humidity
indoor moisture control
New Zealand
building envelope
indoor health
insulation
houses
relative humidity
indoor moisture control
New Zealand
ANZSRC Field of Research Code (2020)
Citation
Su, B. (2017, May). R-values, humidity and health: Case studies from Auckland Wellington. Paper presented at the Eco Design Advisors Conference Workshop, Wellington, New Zealand.
Abstract
The Auckland winter is rainy season. High indoor relative humidity is a major issue for Auckland housing indoor health conditions (Figure 1). According to international and national standards, the indoor relative humidity should be lower than 60% for indoor air quality [1-5]. Most of the health effects such as bacteria, viruses, fungi, mites, etc. have increases associate with very high indoor relative humidity (Figure 2). Maintaining indoor relative humidity between 40% and 60% can minimize the indirect health effects. The abundance of two major causes of allergy, mites and fungi in New Zealand housing, increase proportionately with average indoor relative humidity [6]. New Zealand has some of the highest levels of house dust mite allergens in the world [6]. Visible mould growth on indoor surfaces is a common problem in over 30% of New Zealand houses
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