kuniokoa™
kuniokoa™
Manufacturer

Kuniokoa™ is a high performing natural-draft woodstove that saves firewood, reduces emissions, and is made from high-quality stainless steel. The stove was developed in partnership by the University of Washington, Burn Design Lab, and BURN Manufacturing. Prior to full production, kuniokoa™ underwent extensive user research with hundreds of participants and has undergone thousands of hours of lab and lifetime-assessment testing.

IWA tiers of performance
Show subtiers
3
Emissions
2
Efficiency
2
Indoor emissions
3
Safety
Information for consumers
Maximum pot capacity
7 L
Approximate lifetime
3 years
People fed per meal
8-12
Pot type accommodated
(Flat bottom/Round bottom)
Both
Countries deployed
Kenya, Uganda, United Republic of Tanzania
Common foods cooked
ugali, rice, githeri, veggies, chapatti, lentils, beans, tea, etc.
Manufacturer's warranty available?
Yes
Warranty details
2 year warranty
General information
Manufactured in
Kenya
Suggested retail price
not available
Dimensions (l/w/h)
/280/320 mm
Weight
3.7 kg
Shipping dimensions
300/300/320 mm
Shipping weight
4.3 kg
Local assembly possible?
Yes
Materials needed for local assembly
not available
Includes instructions?
Yes
Instruction details
not available
Other information
not available
Characteristics
Non-traditional, Household, Portable, Side-feed, Rocket
Fuels
Wood
Materials
Metal
Performance details
IWA emissions  
Metric Min value Max value Number of tests
IWA high power CO 1.9069 g/MJ-del 1.9069 g/MJ-del 1
IWA high power PM 103.94 mg/MJ-del 103.94 mg/MJ-del 1
IWA low power CO 0.0334 g/min/L 0.0334 g/min/L 1
IWA low power PM 1.4175 mg/min/L 1.4175 mg/min/L 1
IWA efficiency  
Metric Min value Max value Number of tests
IWA high power thermal efficiency 40.012 % 40.012 % 1
IWA low power specific consumption 0.0285 MJ/min/L 0.0285 MJ/min/L 1
IWA indoor emissions  
Metric Min value Max value Number of tests
IWA CO 0.1485 g/min 0.1485 g/min 1
IWA PM 8.0657 mg/min 8.0657 mg/min 1
Efficiency, energy consumption and fuel use
Metric Min value Max value Number of tests
Cold start thermal efficiency 40.355 % 40.355 % 1
Hot start thermal efficiency 38.64 % 38.64 % 1
Simmer thermal efficiency 31.33 % 31.33 % 1
Specific fuel consumption cold start 56.034 g/L 56.034 g/L 1
Specific fuel consumption hot start 56.3 g/L 56.3 g/L 1
Temp-corrected specific consumption cold start 54.1197 g/L 54.1197 g/L 1
Temp-corrected specific consumption hot start 56.68 g/L 56.68 g/L 1
Temp-corrected specific energy cons cold start 1045.27 kJ/L 1045.27 kJ/L 1
Temp-corrected specific energy cons hot start 1094.8 kJ/L 1094.8 kJ/L 1
Burning rate hot start 278.13 g/min 278.13 g/min 1
Burning rate cold start 11.61 g/min 11.61 g/min 1
Burning rate simmer 6.256 g/min 6.256 g/min 1
Specific fuel consumption simmer 67.733 g/L 67.733 g/L 1
Temp-corrected specific energy cons simmer 1308.6 kJ/L 1308.6 kJ/L 1
Output
Metric Min value Max value Number of tests
Cold start firepower 3221.917 W 3221.917 W 1
Hot start firepower 3263.575 W 3263.575 W 1
Simmer firepower 2014.66 W 2014.66 W 1
Time to boil cold start 27.658 min 27.658 min 1
Time to boil hot start 27.433 min 27.433 min 1
Temp-corrected time to boil cold start 26.714 min 26.714 min 1
Temp-corrected time to boil hot start 27.619 min 27.619 min 1
Turn down ratio 1.5941 1.5941 1
Safety metrics
Metric Min value Max value Number of tests
Sharp edges and points rating 4.0 4.0 1
Cookstove tipping rating 3.0 3.0 1
Containment of fuel rating 3.0 3.0 1
Obstructions near cooking surface rating 4.0 4.0 1
Surface temperature rating 3.0 3.0 1
Heat transmission to surroundings rating 4.0 4.0 1
Temperature of operational construction rating 4.0 4.0 1
Chimney shielding rating 4.0 4.0 1
Flames surrounding cookpot rating 4.0 4.0 1
Flames or fuel exiting chamber rating 3.0 3.0 1
Total safety score 88.5 points 88.5 points 1