Standard
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AS/NZS 4012:2025
[Current]Domestic solid fuel burning appliances - Method for determination of power output and efficiency
Sets out sufficiently comprehensive specifications and instructions to enable all interested organizations with appropriate test facilities to determine the power output and efficiency of solid fuel burning appliances.
Published: 20/06/2025
Pages: 26
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
2 Principle
3 Apparatus
4 Test enclosure and flue
4.1 General
4.2 Room insulation
4.3 Length of flue
4.4 Exposed flue within calorimeter room
4.4.1 Freestanding appliances
4.4.2 Fireplace-insert appliances
4.4.3 Built-in appliances
4.5 Air temperatures
4.6 Air pressure
4.7 Wall temperatures
4.8 Air flow
4.9 Calibration
4.9.1 Calorimeter room
4.9.2 Barometer
4.9.3 Anemometer
4.9.4 Weighing instruments
5 Measurement accuracy
5.1 Temperature and mass flow
5.2 Calorimeter room scales
5.3 Uncertainty of measurement of efficiency
6 Test fuel
6.1 General
6.2 Fuel chamber usable volume
6.3 Test fuel load
6.3.1 General
6.3.2 Firewood test fuel load mass
6.3.3 Coal test fuel load mass
6.3.4 Combination firewood and coal fuels
6.4 Firewood piece dimensions
6.4.1 General
6.4.2 Length range
6.4.3 Cross-section
6.4.4 Calculation of number of fuel pieces in a test fuel load
6.4.5 Firewood piece length
6.5 Test fuel requirements for Australia
6.6 Test fuel requirements for New Zealand
7 Test procedure
7.1 Preparation before testing
7.1.1 Appliance air flow test
7.1.2 Conditioning burn
7.1.3 Post-conditioning adjustment
7.1.4 Ash
7.1.5 Fire lighting
7.1.6 Pretest burn cycle
7.2 Fuel loading
7.2.1 General
7.2.2 Firewood loading geometry
7.2.3 Coal fuel-loading geometry
7.2.4 Mixed firewood and coal fuel-loading geometry
7.3 Burn rates
7.4 Burn cycle
7.5 Number of burn cycles
7.6 Data-recording interval
7.7 Operation of the appliance
7.7.1 Baffle bypass damper
7.7.2 Burn-rate control
7.7.3 Fans
7.7.4 Other controls
7.7.5 Automatic controls
7.8 Appliances with a water-heating facility
7.9 Ducted appliances
7.10 Post-burn appliance air-flow test
8 Calculation and reporting of results
8.1 Calculations
8.1.1 Average power
8.1.2 Heat output
8.1.3 Energy input
8.1.4 Efficiency
8.1.5 Fuel consumption rate
8.2 Test report
9 Marking
9.1 General
9.2 Compulsory permanent marking
9.3 Fuel types
9.4 Additional marking
9.5 Retesting exemption
9.6 Sample Marking Plates
10 Minimum allowable heating efficiency level
10.1 General
10.1.1 For Australia
10.1.2 For New Zealand
10.2 Valid tests
Appendix A
A.1 Scope
A.2 Worked example—firewood determination
Appendix B
B.1 Scope
B.2 Requirements
B.3 Equipment and facilities
B.3.1 Water temperature measurement system
B.3.2 Water flow measurement system
B.3.3 Water supply
B.4 Installation
B.5 Procedure
B.6 Calculation
B.7 Test report
Bibliography
Cited references in this standard
[Current]
Domestic solid fuel burning appliances - Method for determination of flue gas emission
AS/NZS 4014
Domestic solid fuel burning appliances—Test fuels
Content history
[Superseded]
[Superseded]
DR AS/NZS 4012:2024
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