Houses on a Wellington hillside

15 January 2022

Associations between house characteristics and inspector-assessed subjective indoor dampness (yes/no) and measured floor and ceiling joist timber moisture were measured, using the 2005, 2010 and 2015 New Zealand House Condition Surveys, involving 1572 timber-framed houses. We conducted logistic (dampness) and linear regression (moisture) for each survey separately and mutually adjusted for other house characteristics (ventilation, insulation, subfloor defects, building envelope condition (BEC) defects, tenure, number of occupants), climate zone (latitude), rainfall and outdoor temperature.

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6 April 2021

This paper assesses the contribution of heating and household factors to indoor NO2 in almost 350 homes and reports on the reduction in NO2 levels due to heater replacement.

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1 April 2021

ODINs (Outdoor Dust Information Node) are devices designed and built at NIWA that are designed to be deployed in grids of 25 to 100 units across a town. Each unit measures particulate matter levels (PM10 and PM2.5) every 10 minutes or faster, sending data to the cloud via the mobile phone network.

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3 March 2021

Ventilation plays a major role in indoor air quality and moisture management in houses, lowering humidity levels and diluting and removing contaminants that impact on health and productivity. Research suggests, however, that houses are not being effectively ventilated. There are steps that both designers and home occupiers need to take to ensure healthier air in our homes.

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View through an open window to the sky outside

1 June 2020

The identification of indoor air pollutants is useful for exposure analysis and air quality management as we spend 80-90% of our time in built environments. We present the results from a study of indoor aerosol composition across a range of residential housing stock in Wellington, New Zealand.

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18 March 2020

This study investigates the thermal efficiency of a solar air heater (SAH), when it was mounted on a custom-made support frame, and was operated under different air mass flow rate.

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1 December 2019

Bushfires, prescribed burns and residential wood burning are a significant source of fine particles affecting the health and well-being of many communities. Despite the lack of evidence, homes are perceived as a critical frontline of defence against episodic outdoor air pollution from smoke emissions.

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1 October 2019

The indoor air quality of seven homes in the Wellington region was monitored over May-September 2017.

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1 October 2019

Using commercial equipment to test the air quality in every New Zealand classroom would be prohibitively expensive. This project developed a low-cost sensor platform with remote logging and data transmission and tested it in 11 schools.

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Children with hands raised to answer the teacher's question in a classroom

1 October 2019

A study of the air quality in a Wellington primary school classroom measured temperature, humidity, carbon dioxide (CO2), nitrogen dioxide (NO2) and particulates. Elements in the particulates were also identified to find the source of the pollution.

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16 September 2019

2019 Clean Air Society of Australia and New Zealand conference proceedings.

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Children with hands raised to answer the teacher's question in a classroom

1 March 2019

Children are particularly vulnerable to the health effects of air pollution and as they spend a large proportion of time at school, this is an important environment for children’s exposure to air pollution. Understanding the factors that influence indoor air quality in schools is critical for the assessment and control of indoor air pollution.

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12 April 2018

A low-cost, low power consumption indoor environment monitoring device, called SKOMOBO (SKOol Monitoring Box), was developed. SKOMOBO includes the sensors to monitor temperature/relative humidity, carbon dioxide, particulate matter (PM) and motion (PIR). SKOMOBO was developed using the open source software on Arduino Pro Mini.

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15 May 2017

The purpose of this study was to determine the environmental impacts associated with a deep energy efficiency refurbishment using life cycle assessment. A prototypical refurbished model of an office building located in Auckland, New Zealand was used as a case study. The refurbishment included major changes to the building envelope with additional insulation, modified wall-window ratio, solar shading as well as technical replacement of the lighting and HVAC system.

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1 January 2017

A literature review of healthy homes and schools with emphasis on the issues pertinent to New Zealand.

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7 September 2013

2013 Clean Air Society of Australia and New Zealand conference proceedings.

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1 August 2011

There is growing evidence that asthma symptoms can be aggravated or events triggered by exposure to indoor nitrogen dioxide (NO2) emitted from unflued gas heating.

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