The 2014 Prime Minister's Science Prize winner Professor Philippa Howden.

A researcher's tireless efforts to ensure every Kiwi can have a safe, warm and dry home has been rewarded with the country's largest prize for science.

At a ceremony in Wellington yesterday, Professor Philippa Howden-Chapman, of the University of Otago, became the first woman and social scientist to receive the $500,000 Prime Minister's Science Prize.

She said the prize, presented to the He Kainga Oranga/Housing and Health Research Programme which she leads, was "fulsome acknowledgment" of 15 years of her team's work that had involved thousands of Kiwis, informed policy and earned global acclaim.

Worried about growing inequality in New Zealand, Professor Howden-Chapman was moved to create a team that today includes 28 scientists.

"There's been a long-standing assumption that all New Zealanders would own their own house but a lot of people now live in rental housing," she said.

"I wanted to provide evidence to support the premise that everyone should have the right to warm, dry, safe housing regardless of whether they own or rent."

The team has since worked around the country to address long-standing quality problems in housing, particularly as they affect vulnerable groups such as children, older people and those with chronic health conditions including asthma.

Through large scale community trials, involving around 10,000 New Zealanders, the team has demonstrated the effectiveness of initiatives such as retrofitting insulation to modern standards, installing effective and non-polluting heating and remediating injury hazards in homes.

The team evaluated the Warm-Up New Zealand programme, which itself was based on evidence from two of its earlier community studies.

The research showed that insulation or heating retrofits led to significant reductions in hospitalisations, the amount of medication required, energy consumption and premature deaths in people aged 65 and over.

A conservative estimate of the programme's net benefit has been shown to be around $950 million.

The work was also globally significant: in 2009, Professor Howden-Chapman was invited to chair the World Health Organisation's (WHO) Housing and Health Guidelines Development Group.

Dr Carlos Dora, co-ordinator of the WHO's Department of Public Health and Environment, described Professor Howden-Chapman and her team as "global leaders" in their area.

The International Energy Agency also considered the work "one of the most analytically robust and politically compelling" among the huge range of studies the organisation has reviewed.

"I feel very proud of what our team's been able to do," Professor Howden-Chapman said.

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