Respiratory diseases lower in homes with retrofitted insulation

Respiratory diseases lower in homes with retrofitted insulation
Distribution of baseline and follow-up between intervention and control houses. Credit: Indoor Air (2022). DOI: 10.1111/ina.13101

Retrofitting home insulation can reduce the onset of chronic respiratory diseases such as asthma by up to 10%, new University of Otago research shows.

The research, published in science journal Indoor Air, found insulation can also help to manage symptoms, with even greater gains in homes that also had fitted.

Researchers from the He Kāinga Oranga—Housing and Health Research Program at the University's Wellington campus analyzed pharmaceutical prescriptions that were dispensed to residents of more than 200,000 that received subsidized insulation through the EECA Warm-Up New Zealand: Heat Smart program that ran between 2009 and 2014.

Results show the , which included people whose homes were insulated between 2009 and 2011, was 10% less likely to develop when compared with a whose homes had no retrofitted insulation.

Children under the age of 15 were 15% less likely.

Lead author Dr. Caroline Fyfe says the results support other studies conducted by He Kāinga Oranga that show children are less likely to develop asthma symptoms when their is warmer and less prone to damp and mold.

"We also know that the longer people are exposed to cold and damp housing the more likely they are to develop chronic respiratory disease, so it is particularly important that children have a healthy home environment," Dr. Fyfe says.

Researchers also discovered there was a 4% relative reduction in medication for respiratory disease symptoms dispensed to the intervention group after insulation was retrofitted.

The reduction was 7% when a low-emissions, energy efficient heater—mostly commonly a heat pump—was also installed.

Dr. Fyfe says the study adds to an emerging body of evidence that new onset of chronic respiratory conditions, as well as exacerbation of pre-existing diseases, can be prevented, at least in part, by addressing some of the causes of cold damp housing in Aotearoa New Zealand.

"Most New Zealand houses are cold by international standards, and many were built before insulation was required.

"Retrofitting is a relatively inexpensive way of not only making houses warmer and more affordable to heat but also healthier to live in."

More information: Caroline Fyfe et al, Retrofitting home insulation reduces incidence and severity of chronic respiratory disease, Indoor Air (2022). DOI: 10.1111/ina.13101

Journal information: Indoor Air
Citation: Respiratory diseases lower in homes with retrofitted insulation (2022, September 7) retrieved 15 April 2024 from
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