Sources of nitrogen dioxide (NO2) in New Zealand homes: Findings from a community randomized controlled trial of heater substitutions

6 April 2021

J. Gillespie-Bennett, N. Pierse, K. Wickens, J. Crane, S. Nicholls, D. Shields, M. Boulic, H. Viggers, M. Baker, A. Woodward, P. Howden-Chapman, The Housing, Heating, and Health Team
Indoor Air, 18(6), 521-528. doi: 10.1111/j.1600-0668.2008.00554.x

Houses in New Zealand have inadequate space heating and a third of households use unflued gas heaters. As part of a large community intervention trial to improve space heating, we replaced ineffective heaters with more effective non-polluting heaters. 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.