Test result: Three Stone Fire
Water boiling test (WBT)
Stove and fuel
Stove description
TSF carefully tended, wood fuel (Wet)
Stove characteristics
Three stone fire
Fuel type
Wood
Fuel description
Red Oak (Quercus rubra), wet
Fuel moisture content
0.2243%
Fuel net calorific value
17.7 MJ/kg
Test information
Test details
WBT 4.1.2, 5 Liters of water
Testing organization
Reporting type
Third party
Country
United States
Year performed
2012
Test environment
Lab
Altitude
not available
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 19.9 g/MJ-del 0.85 0.04
IWA high power PM 2390.0 mg/MJ-del 350.0 0.15
IWA low power CO 0.229 g/min/L
IWA low power PM 28.733 mg/min/L
IWA efficiency  
Metric Value SD (σ) Cv
IWA high power thermal efficiency 13.7% 0.6 0.04
IWA low power specific consumption 0.068 MJ/min/L
IWA indoor emissions  
Metric Value SD (σ) Cv
IWA CO 1.065 g/min
IWA PM 129.667 mg/min
Efficiency, energy consumption and fuel use
Metric Value SD (σ) Cv
Fuel consumed 322.0 g/task
Hot start thermal efficiency 14.2% 0.9 0.06
Cold start thermal efficiency 13.1% 0.3 0.02
Output
Metric Value SD (σ) Cv
Cold start firepower 5433.0 W 301.0 0.06
Hot start firepower 6875.0 W 453.0 0.07
Simmer firepower 4728.0 W 257.0 0.05
Mean time to boil 47.4 min 2.55 0.05
Emissions
Metric Value SD (σ) Cv
CH4 emissions factor (2) 2.29075 g/kg fuel
CO emissions factor (2) 59.59 g/kg fuel
PM2.5 emissions factor (2) 7.2825 g/kg fuel
CO emissions rate 1.065 g/min
PM2.5 emissions rate 134.0009554 mg/min