Wood Burner Emission Limits NZ — 2026 Council Map

Every NZ council's wood burner emission limit explained — from the 1.5 g/kg national standard to Canterbury's 1.0 g/kg + ULEB requirement. Compliance, ULEB explained, subsidies, and penalties.

Quick Answer

New Zealand's national wood burner emission limit is 1.5 g/kg of PM10 (fine particulate) per kilogram of dry wood, plus 65% efficiency. Some regional councils set stricter limits in clean air zones — Canterbury (ECan) and Otago (ORC) are tightest, requiring 1.0 g/kg or ULEB-certified burners in restricted airsheds.

Key Answers

What is the NZ emission limit for wood burners?: 1.5 g/kg of PM10 plus 65%+ efficiency for new burners installed after September 2005. Set by the Resource Management (National Environmental Standards for Air Quality) Regulations 2004. Some councils set stricter local limits.
What is a ULEB?: Ultra-Low Emission Burner — emissions below 0.5 g/kg and efficiency above 65%. Certified by the NZ Home Heating Association. Required in Canterbury's restricted airsheds and Otago's airsheds (Mosgiel, Milton, Alexandra, Cromwell, Arrowtown).
Which councils have the strictest rules?: Environment Canterbury (ECan) is strictest with 1.0 g/kg + ULEB required in 7 airsheds. Otago Regional Council (ORC) is close second. Auckland, Nelson, Bay of Plenty (Rotorua), and Hawke's Bay run targeted airshed schemes.
Do I need to upgrade my burner?: Depends on your council and burner age. Pre-2005 burners are being phased out across all NZ airsheds on different timelines. Check the regional regulations page for your area. Most councils give 2-5 years notice and offer subsidies up to $5,000 to replace.
Why are wood burner emissions regulated?: Wood smoke is the largest single source of winter air pollution in most NZ towns. Fine particulates cause respiratory illness, asthma, and reduced life expectancy. The Ministry for the Environment estimates the health cost at $1.4 billion per year.

Key Takeaways

National limit: 1.5 g/kg PM10 + 65% efficiency for post-2005 burners
Canterbury (ECan) and Otago (ORC) have the strictest local limits with ULEB requirements
Pre-2005 burners face phase-out in all NZ airsheds — check your council for the timeline
Subsidies up to $5,000 available in Canterbury, Otago, Auckland, Nelson, Bay of Plenty
ULEBs burn 30-50% less wood for the same heat output — long-term cost savings

What is PM10 and why does it matter?

PM10 = particulate matter under 10 micrometers diameter.

PM10 = particulate matter under 10 micrometers diameter. Small enough to be inhaled into the lungs and cause respiratory damage. Wood smoke is rich in PM10 and PM2.5 (even smaller particles). NZ's emission limit is set on PM10 because it's both measurable in lab tests and tied to the most documented health harms.

How is the 1.5 g/kg limit measured?

Lab testing under AS/NZS 4012 and AS/NZS 4013.

Lab testing under AS/NZS 4012 and AS/NZS 4013. Burners are tested across multiple burn configurations using standardised dry wood loads. The reported emission is the average across the test cycle.

Does the limit apply to old burners?

Not automatically.

Not automatically. The NES-AQ applies to new installations from September 2005. However, regional councils can mandate replacement of pre-2005 burners on their own timelines — and most councils with airsheds have done so.

What's the difference between a ULEB and a low-emission burner?

All compliant burners post-2005 are 'low emission' (≤1.5 g/kg).

All compliant burners post-2005 are 'low emission' (≤1.5 g/kg). ULEBs are a stricter sub-category — ≤0.5 g/kg, designed for restricted airsheds. ULEB is a NZHHA-certified label, not a regulatory term.

Can I install a new burner anywhere in NZ?

Yes, but it must be compliant.

Yes, but it must be compliant. Outside airsheds, any post-2005 NES-AQ-compliant burner. Inside airsheds, only ULEB-approved or council-specifically-approved models. Always check council planning rules before purchase.

What happens if I bring a non-compliant burner from another country?

Imported burners must pass NZ-specific testing under AS/NZS 4012/4013 to be sold and installed legally in NZ.

Imported burners must pass NZ-specific testing under AS/NZS 4012/4013 to be sold and installed legally in NZ. Most international burners aren't tested. Council inspectors can require removal of unapproved imports, and insurance may not cover them.

Frequently Asked Questions