Malena
Malena
Manufacturer
Locally manufactured

Inbuilt fixed (sunken) two pots stove for households and social institutions; made of improved clay mix with 2 meters metal chimney and ceramic grid. Includes a rocket type combustion chamber, ceramic grid for the fuel located inside the combustion chamber, ashes trap for cleaning and air flow, internal air and gases circulation ducts of standard dimensions. Supported by the EnDev Bolivia/GIZ project.

IWA tiers of performance
Show subtiers
1
Emissions
2
Efficiency
4
Indoor emissions
3
Safety
Information for consumers
Maximum pot capacity
10 L
Approximate lifetime
5 years
People fed per meal
1-5
Pot type accommodated
(Flat bottom/Round bottom)
Both
Countries deployed
Bolivia
Common foods cooked
boiling and fried food
Manufacturer's warranty available?
No
General information
Manufactured in
Bolivia
Suggested retail price
USD 50-70
Dimensions (l/w/h)
900/600/800 mm
Weight
800.0 kg
Shipping dimensions
not available
Shipping weight
not available
Local assembly possible?
Yes
Materials needed for local assembly
Improved clay mix, bricks, local materials for molds like empty oil drums, big bags, sacks and cardboard
Includes instructions?
Yes
Instruction details
Before construction, construction guides are delivered to the local builders and clay preparation brochures to the families in idiomatic Spanish. These instructions contain a step-by-step guide with pictures and drawing for the construction process.
Other information
Warranty depends on local materials like improved clay mix
Characteristics
Non-traditional, Household, Built in place, Rocket, Chimney, Sunken pot, Side-feed
Fuels
Dung, Wood
Materials
Brick, Ceramic, Clay, Metal
Performance details
IWA emissions  
Metric Min value Max value Number of tests
IWA high power CO 12.17 g/MJ-del 12.17 g/MJ-del 1
IWA high power PM 61.1 mg/MJ-del 61.1 mg/MJ-del 1
IWA low power CO 0.06 g/min/L 0.06 g/min/L 1
IWA low power PM 0.3 mg/min/L 0.3 mg/min/L 1
IWA efficiency  
Metric Min value Max value Number of tests
IWA high power thermal efficiency 0.25 % 0.25 % 1
IWA low power specific consumption 0.03 MJ/min/L 0.03 MJ/min/L 1
IWA indoor emissions  
Metric Min value Max value Number of tests
IWA CO 0.12 g/min 0.12 g/min 1
IWA PM 0.6 mg/min 0.6 mg/min 1
Efficiency, energy consumption and fuel use
Metric Min value Max value Number of tests
Cold start thermal efficiency 0.22 % 0.22 % 1
Hot start thermal efficiency 0.28 % 0.28 % 1
Simmer thermal efficiency 0.21 % 0.21 % 1
Specific fuel consumption cold start 89.01 g/L 89.01 g/L 1
Specific fuel consumption hot start 64.81 g/L 64.81 g/L 1
Temp-corrected specific consumption cold start 93.18 g/L 93.18 g/L 1
Temp-corrected specific consumption hot start 71.01 g/L 71.01 g/L 1
Temp-corrected specific energy cons cold start 1717.34 kJ/L 1717.34 kJ/L 1
Temp-corrected specific energy cons hot start 1308.63 kJ/L 1308.63 kJ/L 1
Burning rate hot start 22.74 g/min 22.74 g/min 1
Burning rate cold start 21.88 g/min 21.88 g/min 1
Burning rate simmer 13.75 g/min 13.75 g/min 1
Specific fuel consumption simmer 95.49 g/L 95.49 g/L 1
Temp-corrected specific energy cons simmer 1759.95 kJ/L 1759.95 kJ/L 1
Output
Metric Min value Max value Number of tests
Cold start firepower 6722.02 W 6722.02 W 1
Hot start firepower 6984.07 W 6984.07 W 1
Simmer firepower 4223.74 W 4223.74 W 1
Time to boil cold start 30.5 min 30.5 min 1
Time to boil hot start 20.75 min 20.75 min 1
Temp-corrected time to boil cold start 31.95 min 31.95 min 1
Temp-corrected time to boil hot start 22.78 min 22.78 min 1
Turn down ratio 1.849 1.849 1
Safety metrics
Metric Min value Max value Number of tests
Sharp edges and points rating 4.0 4.0 1
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 4.0 4.0 1
Heat transmission to surroundings rating 4.0 4.0 1
Temperature of operational construction rating 3.0 3.0 1
Chimney shielding rating 2.0 2.0 1
Flames surrounding cookpot rating 4.0 4.0 1
Flames or fuel exiting chamber rating 4.0 4.0 1
Total safety score 90.5 points 90.5 points 1