Updated on January 19, 2024


Created on October 28, 2022

CleanCook Comet 1 & 2

Upcoming Update

CleanCook Comet 1 & 2 are portable, low cost – single and double burner alcohol fueled stoves.

Tested By
  • U.S. Environmental Protection Agency
Content Partners


Product Description

CleanCook Comet 1 & 2 are portable, low cost – single and double burner alcohol fueled stoves that can be obtained fully assembled for immediate sale or as parts that allow for local assembly. This product is designed by CLEANCOOK Sweden AB and manufactured in Durban, South Africa.

Target SDGs

SDG 7: Affordable and Clean Energy

Market Suggested Retail Price


Target Users (Target Impact Group)


Distributors / Implementing Organizations

This product is distributed by CLEANCOOK Sweden AB’s  NGO partner Project Gaia who then works with other local distributors like Motosafi, Clean Cook Africa, Clean cook  Madagascar, Seeds of Change

Competitive Landscape

Direct competitors include Koko Cooker, Jiko Tosha, KIKE Green Cook KD1, and Bio Moto.

Manufacturing/Building Method

CLEANCOOK owns tooling for manufacturing and product patents. Production is outsourced to a partner company in Durban, South Africa. Stove models can be obtained fully assembled for immediate sale or as parts that allow for local assembly.

Intellectural Property Type


User Provision Model

CLEANCOOK works closely with Project Gaia (an NGO promoting clean cookstoves powered by alcohol), with governments and nonprofits , and directly with commercial clients to identify partners in local markets to establish locally owned micro-distilleries. And also  assemble, distribute and  market their products.

Distributions to Date Status

The exact number of CleanCook Comet 1 & 2 stoves sold is unknown, however over 75,000 CleanCook stove models have been sold.

Fuel type

Ethanol / methanol

Chimney (yes/no)


Forced or passive


Pot type

Round & Flat Bottom

Pot capacity (L)


Thermal efficiency (%)


PM emissions (g/MJ delivered to pot)


CO emissions (g/MJ delivered to pot)

1.5 g/MJ

Time to boil (min/L)


Design Specifications

The CleanCook Comet 1 & 2  Stoves are single and double-burner non-pressurized alcohol stoves  for households and institutions made from aluminum, galvanized steel  or stainless steel. The Comet 1 & 2 stoves come with  refillable fuel canisters of 1.2 liters capacity and 1.60 kg weight when full. The canister contains a porous fiber that absorbs alcohol and retains it in a manner that prevents spills, leaks, fires and explosions. After fuel refilling fuel canisters can be inserted from the stove side in an up-right position while the pot is still placed on the pot support, allowing the stove to be refueled quickly. The power output per burner is rated at 1.8 kW at maximum heat, allowing for a cooking time of 4.5 hours. It can burn ethanol and methanol with an efficiency greater than 60% and meets Tier 4 emission requirements. It consists of a built in windshield and a mechanical regulator – a lever moves a metal disk that uncovers an opening for evaporating fuel. The regulator can be used to adjust or extinguish the flame.

  • The Comet 1 weighs 1.7 kg (excl. the canister) with Dimensions (W x D x H) - (295 x 290 x 170) mm.
  • The Comet 2 weighs 4.0 kg (excl. the canister) with Dimensions (W x D x H) - (615 x 290 x 170) mm.

Product Schematics

Technical Support

Provided by local distributors and majorly the manufacturer

Replacement Components

Replaceable components include the fuel canisters and the stove body (a full assembly made up of different parts).


Expected typical lifetime is six years for the aluminum body stove and 10+ years for the stainless steel stove

Manufacturer Specified Performance Parameters

Cooking efficiency greater than 60% , 1 L of fuel per day will provide cooking for a family of 5. A maximum power of 1.8 KW and negligible soot production meeting Clean cooking alliance tier 5 requirements and WHO standards for CO2 emissions with an innovative fuel canister that absorbs the fuel allows for the  fuel to evaporate and mix with air. The mixture burns above the canister opening with no wick and the chimney effect increases its power output.

Vetted Performance Status

Tier 4 for efficiency/fuel use Tier 4 for total emissions and indoor emissions


Ensure that the stove is assembled properly and follow the guidelines provided by the manufacturer to avoid potential burns and spillovers when manipulating the stove. Take care not to overfill the canisters and follow general safety precautions when using the stove and flammable materials.

Complementary Technical Systems


Academic Research and References

Megan B.,Wubshet T., et al,. (2018). A case study of the ethanol CleanCook stove intervention and potential scale-up in Ethiopia. Energy for Sustainable Development. 46. 10.1016/j.esd.2018.06.009.

Wenjing S., Kerui Z. (2014) Business Plan for sustainable ethanol cooking fuel in the developing world. Duke University Nicholas school- prepared for project Gaia.

Donee A., Amanda N., Theodore K., Oludare M., et al. (2017) Pregnancy Outcomes and ethanol cook stove intervention: A randomized-controlled trial in Ibadan, Nigeria. Environment International.

Boris A., (2010) Socio-cultural dimensions in household cooking energy choice – Implications for energy transition in Catembe, Mozambique. Department of Human Geography, Stockholm University.

Temilade S., Sujatha R., et al.,(2013) Corporate-Led Sustainable Development and Energy Poverty Alleviation at the Bottom of the Pyramid: The Case of the CleanCook in Nigeria, World Development -Volume 45 : Pages 137-146.

Michael G., Maria B., Mike J., et al. (2016) An evaluation of a biomass stove safety protocol used for testing household cookstoves, in low and middle-income countries. Energy for Sustainable Development – Volume 33, Pages 14-25.

Temilade S.,(2014) What’s cooking? Evaluating context-responsive approaches to stove technology development in Nigeria and Kenya. Technology in Society – Volume 39, Pages 142-150.

Burnham-Slipper H., MIcheal J., et al. (2009) Breeding a Better Stove: the Use of Genetic Algorithms and Computational Fluid Dynamics to Improve Stove Design. The University of Nottingham, EWB-UK research conference.

Elisa P., (2013) Cooking with ethanol: a stakeholders’ perspective. University of Liverpool


Local distributors: Motosafi, Clean cook Africa, Clean cook  Madagascar, Seeds of Change

Technical Support

U.S. Environmental Protection Agency, (2015), Test Report, CleanCook Model A1 Stove with Alcohol Fuel

Compliance with regulations

ISO (International Organization for Standardization) IWA (International Workshop Agreement) 11:2012

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