The information presented above may include data from multiple sources. Sources of this information could include both 3rd party testing centers as well as cookstove producers/manufacturers/etc.
Performance Metrics
ISO Performance Metrics
Metric
Mean Value
Range
Number of Data Sources
Most Recent Submission
Fuels
Data Source
ISO Carbon Monoxide [g/MJ-del]
Not Available
Not Available
0
Not Available
Not Available
Not Available
ISO Particulate Matter [mg/MJ-del]
Not Available
Not Available
0
Not Available
Not Available
Not Available
ISO Thermal Efficiency - With Credit for Char [%]
Not Available
Not Available
0
Not Available
Not Available
Not Available
ISO Thermal Efficiency - Without Credit for Char [%]
Not Available
Not Available
0
Not Available
Not Available
Not Available
ISO Safety
Not Available
Not Available
0
Not Available
Not Available
Not Available
ISO Durability
Not Available
Not Available
0
Not Available
Not Available
Not Available
IWA Emissions
Metric
Mean Value
Range
Number of Data Sources
Most Recent Submission
Fuels
Data Source
IWA High Power CO [g/MJ-del]
Not Available
Not Available
0
Not Available
Not Available
Not Available
IWA High Power PM [mg/MJ-del]
Not Available
Not Available
0
Not Available
Not Available
Not Available
IWA Low Power CO [g/MJ-del]
Not Available
Not Available
0
Not Available
Not Available
Not Available
IWA Low Power PM [mg/MJ-del]
Not Available
Not Available
0
Not Available
Not Available
Not Available
IWA Indoor Emissions is a derived valued that is based upon estimating the steady state concentration that would occur in a representative house. The estimated indoor air concentration is based upon a "single-zone box model" calculation. The World Health Organization has developed free tools to estimate the concentration of harmful pollutants that can be used to determine likely concentrations in household sizes and ventilation situations that differ from those used in the IWA calculations. These tools can be found at https://worldhealthorg.shinyapps.io/who_pt/ and https://worldhealthorg.shinyapps.io/who_homes/.
IWA Efficiency
Metric
Mean Value
Range
Number of Data Sources
Most Recent Submission
Fuels
IWA High Power Thermal Efficiency [%]
Not Available
Not Available
0
Not Available
Not Available
Not Available
Low Power Specific Consumption [MJ/min/L]
Not Available
Not Available
0
Not Available
Not Available
Not Available
The testing data presented above is a compilation of results from multiple sources; some of these sources could be self-reported. The summary statistics above (mean and range) are compiled from the data as it was presented to the Catalog - in many cases, different data sets will have differing numbers of test replicates.
ABOUT THE TIERS OF PERFORMANCE
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About the Tiers of Performance
IWA Tiers: Many of the current Catalog test results follow protocols consistent with the International Workshop Agreement requirements and reporting requirements (Water Boiling Test version 4.1.2 and above, and the Biomass Stove Safety Protocol) and are mapped to IWA Tiers for overall emissions, indoor emissions, efficiency, and safety, across Tiers 0 (worst) to 4 (best).
ISO Tiers: As of 2018, with the publication of ISO 19867:2018, the IWA and associated tiers have been replaced by the ISO Harmonized laboratory test protocols Part 1: Standard test sequence; and Part 3: Voluntary Performance Targets (VPTs). CCA is now in the process of requesting and commissioning additional ISO test data for inclusion in the Catalog. During this transition, IWA test results will continue to be included in the Catalog.
The VPTs cover 5 metrics: thermal efficiency, fine particulate matter emissions, carbon monoxide emissions, safety, and durability. Lab test results are rated from 0 (worst performing) to 5 (best performing) for each metric. Tier 0 represents performance typical of open fires and the simplest cookstoves. Tier 5 is an aspirational goal, and for emissions are mapped to World Health Organization's breathing air quality guidelines.
VPTs are to be used with ISO testing only; results from other protocols cannot be mapped to this framework. For each product, tiers must be reported independently for each metric; they cannot be combined.
