Test result
Water boiling test (WBT)
Stove and fuel
Stove description
VITA (Volunteers in Technical Assistance) stove. Provides a shield around the fire that may be beneficial during windy conditions, and a skirt around the sides of the pot improves heat transfer from the hot combustion gases to the pot. Fuel wood is burned on a grate on the bottom of the stove.
Stove characteristics
Non-traditional
Fuel type
Wood
Fuel description
Kiln-Dried Douglas fir
Fuel moisture content
0.1%
Fuel net calorific value
19.5 MJ/kg
Test information
Test details
WBT-3.2, Cold Start; Hot Start; 45 Simmer
Testing organization
Reporting type
Third party
Country
United States
Year performed
2009
Test environment
Lab
Altitude
100 m
Number of replicate tests
3
Test result IWA tiers of performance
Show subtiers
unrated
Emissions
unrated
Efficiency
unrated
Indoor emissions
unrated
Safety
Performance metrics
IWA emissions  
Metric Value SD (σ) Cv
IWA high power CO 8.327 g/MJ-del
IWA efficiency  
Metric Value SD (σ) Cv
IWA high power thermal efficiency 32.2%
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO 0.168 g/min
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Fuel consumed 128.0 g/task 9.3 0.07
Hot start thermal efficiency 32.2%
Cold start thermal efficiency 29.9%
Output
Metric Value SD (σ) Cv
Mean time to boil 14.1 min
Emissions
Metric Value SD (σ) Cv
CO emissions factor (2) 50.39 g/kg fuel 19.38 0.38
PM2.5 emissions factor (2) 3.92 g/kg fuel 0.96 0.24
CO emissions rate 0.168378954 g/min 0.064769991 0.38
PM2.5 emissions rate 13.10719484 mg/min 3.21085053 0.24
Test Conditions Metrics
Metric Value SD (σ) Cv
Local boiling point 99.6 degrees C