Similar situation to Melbourne & surrounds, I suspect.

[...]
Open fires were found to be the most harmful way to heat a home. The health impacts of extra air pollution breathed in each house with a fire led to an annual cost of around NZ$53,400 (£23,000) to the New Zealand healthcare system and economy. This assumes a household of two adults and two children who are exposed to air pollution indoors from their open fire.

Even modern stoves created indoor air pollution. The researchers estimated a health and economy cost of NZ$1,800 annually from air pollution breathed in by each household that used one of these appliances. And indoor pollution from gas cooking exerted an annual cost of NZ$9,200 from each household.
[...]
Wood burning also adds to outdoor air pollution, which affects the local community. This extra health cost was NZ$3,200 (£1,400) annually for each modern wood stove and as much as NZ$26,800 (£11,500) for each open fire.

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cross-posted from: https://slrpnk.net/post/28991736

Indoor air pollution from New Zealand’s 523,000 wood burners was estimated to account for 446 hospital admissions for heart and lung problems, and 101 early deaths annually, in a country with a population of just over 5 million people. Breathing fumes from gas cooking indoors created more than 1,000 hospital admissions, 208 early deaths and more than 3,000 new cases of childhood asthma each year.