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
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)
(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
Availability
On the market
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 |