Chitetezo
Chitetezo

The Chitetezo Mbaula is an improved cook stove locally-made of clay that caters for various size pots for cooking and heating water. The Chitetezo reduces fuel consumption by improved combustion and improved heat transfer. The current Chitetezo design is the product of over 15 years research and development, mainly in Malawi, incorporating user feedback and local preferences. A mechanical mold, known as the paddle mold, is used to facilitate standardization and to improve productivity. In 2014, quality control specifications were agreed on by various stakeholders in Malawi, which can form the basis of national and international standards for the Chitetezo.

IWA tiers of performance
Show subtiers
unrated
Emissions
2
Efficiency
unrated
Indoor emissions
3
Safety
Information for consumers
Maximum pot capacity
20 L
Approximate lifetime
4 years
People fed per meal
1-12
Pot type accommodated
(Flat bottom/Round bottom)
Both
Countries deployed
Kenya, Malawi, Mozambique, Rwanda, Zambia, Zimbabwe
Common foods cooked
Nsima / nshima / sadza, relish, beans & fish.
Manufacturer's warranty available?
No
General information
Manufactured in
Kenya, Malawi, Mozambique, Rwanda, Zambia, Zimbabwe
Suggested retail price
USD 2-4
Availability
On the market
Dimensions (l/w/h)
300/300/265 mm
Weight
8.0 kg
Shipping dimensions
350/350/300 mm
Shipping weight
9.0 kg
Local assembly possible?
Yes
Materials needed for local assembly
Clay, fuel (in fuel efficient kiln), and water. Mechanical mold highly recommended for standardization and improved productivity.
Includes instructions?
No
Other information
The stove is called Chitetezo in Malawi, Mozambique, Zambia and Zimbabwe, which in Nyanja means the "protecting" stove. In Rwanda the stove is called Canarumwe and in Kenya it is called Upesi Digital.
Characteristics
Non-traditional, Household, Portable, Side-feed, Heating, Rocket, Ceramic-lined
Fuels
Crop residues, Wood
Materials
Ceramic, Clay
Performance details
IWA efficiency  
Metric Min value Max value Number of tests
IWA high power thermal efficiency 29.0 % 33.0 % 2
IWA low power specific consumption 0.0262 MJ/min/L 0.0262 MJ/min/L 1
Efficiency, energy consumption and fuel use
Metric Min value Max value Number of tests
Cold start thermal efficiency 24.0 % 30.0 % 2
Hot start thermal efficiency 34.0 % 36.0 % 2
Fuel consumed 1400.0 g/task 1400.0 g/task 1
Simmer thermal efficiency 28.0 % 31.0 % 2
Specific fuel consumption cold start 75.0 g/L 94.9 g/L 2
Specific fuel consumption hot start 59.0 g/L 63.9 g/L 2
Temp-corrected specific consumption cold start 95.9 g/L 95.9 g/L 1
Temp-corrected specific consumption hot start 65.9 g/L 65.9 g/L 1
Temp-corrected specific energy cons cold start 1852.2 kJ/L 1852.2 kJ/L 1
Temp-corrected specific energy cons hot start 1272.0 kJ/L 1272.0 kJ/L 1
Burning rate hot start 11.9 g/min 14.5 g/min 2
Burning rate cold start 12.2 g/min 12.5 g/min 2
Burning rate simmer 7.2 g/min 7.2 g/min 2
Specific fuel consumption simmer 78.5 g/L 81.0 g/L 2
Temp-corrected specific energy cons simmer 43717.7 kJ/L 43717.7 kJ/L 1
Output
Metric Min value Max value Number of tests
Cold start firepower 3747.0 W 4020.0 W 2
Hot start firepower 3670.0 W 4657.0 W 2
Simmer firepower 2208.0 W 2264.0 W 2
Time to boil cold start 30.0 min 37.3 min 2
Time to boil hot start 21.3 min 24.0 min 2
Temp-corrected time to boil cold start 37.7 min 37.7 min 1
Temp-corrected time to boil hot start 22.1 min 22.1 min 1
Turn down ratio 1.7 1.77 2
Emissions
Metric Min value Max value Number of tests
PM2.5 emissions factor (2) 6.7 g/kg fuel 6.7 g/kg fuel 1
CO emissions factor (2) 106.0 g/kg fuel 106.0 g/kg fuel 1
PM2.5 emissions rate 121.0 mg/min 121.0 mg/min 1
CO emissions rate 1.84 g/min 1.84 g/min 1
OC emissions factor (2) 1.5 g/kg fuel 1.5 g/kg fuel 1
CO2 emissions factor (2) 1666.8 g/kg fuel 1666.8 g/kg fuel 1
CO2 emissions rate 26.63 g/min 26.63 g/min 1
EC emissions factor (2) 1.5 g/kg fuel 1.5 g/kg fuel 1
EC/TC 0.4 0.4 1
EC emissions rate 24.6 mg/min 24.6 mg/min 1
OC emissions rate 45.6 mg/min 45.6 mg/min 1
Safety metrics
Metric Min value Max value Number of tests
Cookstove tipping rating 4.0 4.0 1
Containment of fuel rating 3.0 3.0 1
Obstructions near cooking surface rating 4.0 4.0 1
Surface temperature rating 1.0 1.0 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 4.0 4.0 1
Total safety score 91.5 points 91.5 points 1
EPTP metrics
Metric Min value Max value Number of tests
Average fuel use 764.0 g 764.0 g 1