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ETHOS 2023

January 27 - 29, 2023

Friday Agenda



January 27th, 2023

Time (PST)



4:00 PM

Stoves 101

Dean Still

5:00 PM

Registration table opens

Check in and pick up your name tag

5:30 PM

Eat, Drink, Socialize

6:30 PM

Friday Night Slides w/ Ryan Thompson

All who are interested


January 28th, 2023

Time (PST)



8:00 AM

Coffee & Pastries

8:30 AM

Conference Welcome / Opening

9:00 AM

Plenary 1 - Climate-related overview of major initiatives and research happening in the clean cooking sector

10:00 AM

Coffee Break - Hallway Time

10:30 AM

Plenary 2- Carbon Finance

11:30 AM


1:00 PM

Breakout Session 1

Field Testing - Room 1

Olivier Lefebvre | Nordica MacCarty, Grant Ross, Olivier Lefebvre, Alena Morris | Christa Roth

Fuels - Room 2

Orion Barar | Dr. Chris ADAM | Prabin Shrestha

Spanish Language Session - Room 3

Anibal, Benjamin Osorto | Augusto Mulanovich | Victoria Cortes Matamoros | Anaid González, Vincent Bossy, Edgar Tafoya

2:00 PM

Coffee Break - Hallway Time

2:15 PM

Breakout Session 2

Measuring Adoption in the Field - Room 1

Martha McAlister | Rejoice Ntiriwaa Ossei-Bremang

New Product Introduction and Testing - Room 2

David Evitt | Jeremiah Su | Sam Bentson | Mattias Ohlson

Theory and Simulation - Room 3

Ilich Rivas | Ryan Thompson | Dr. Girish Sapra

3:15 PM

Coffee Break - Hallway Time

3:30 PM

Plenary - What Can the Wood Heating and Cooking Sectors Learn From Each Other?

4:45 PM

Closing Plenary - Wrap up Day 1

Saturday Agenda
Sunday Agenda


January 29th, 2023




7:00 AM

Walk for Change w/ Ryan Thompson

Walk from the Baymont Hotel to Northeastern University (~4mi)

8:00 AM

Coffee & Pastries

8:30 AM

Conference Welcome / Opening

8:45 AM

Plenary 3 - RTKCs and Testing

9:45 AM

Coffee Break - Hallway Time

10:15 AM

Breakout Session 3

French Language Session - Room 1

Louis Nahimana | Augustin Lonena Mulenda | Candide Nahimana, Candide Some

Insights from Lab Testing - Room 2

John Flynn, Tami Bond | Vi Rapp (Presenter), Julien Caubel, Rebecca Trojanowski, Tom Butcher | Valens Uwizeyimanaa, J B Nkurikiyeiye, Bruno Verbist, Bart Muysa

Real Solutions for Real Impact - Room 3

Paul S. Anderson, James S. Schoner | Kevin McLean | Ken Newcombe and Dean Still

11:15 AM

Coffee Break - Hallway Time

11:45 AM

Breakout Session 4

Capacity and Policy - Room 1

Nelson Godfried Agyemang | Koko Industries | Conor Fox | PACCI Africa

Stove Tech Development and Selection - Room 2

Justin Wimpey | Norman Baker | Gustavo Peña

1:00 PM


2:30 PM

Closing Plenary

3:30 PM

Stove Lighting & S'mores!


Abstracts and Presentations

Emerging Cooking Solutions

2 - Saturday late afternoon

New product introduction and testing

Mattias Ohlson

What is innovative about our approach is that we have now developed an entire platform, connected to Internet, with 2000 stoves and 30 million records already received which:
-Makes the stoves affordable (by letting carbon credits pay for the stoves)
-Leads to 50% savings on fuel (pellets) compared with charcoal
-Convenience (home delivery using electric 3-wheelers)

We are treating customers like long-term partners through a “cooking as a service model”. The usage rate is quite stunning, and we have the data to prove it since the stoves are connected to internet.

We have also developed a whole new type of gasification stoves, which was tested at Aprovechio as the cleanest and most efficient (?) ever:

Finally, we are about to launch a carbon credit solution, which potentially can give lots of other distribution companies easy access to premium carbon finance:

Knowledge is power! Do we know at what power stove are used?

1 - Saturday early afternoon

Field testing

Olivier Lefebvre

Biomass stoves maybe be used at a wide range of firepower. This impacts directly their performance in terms of thermal and combustion efficiency. Understanding these power patterns is important for usability: we need to design improved stoves that can match the observed cooking power of traditional stoves. It is also useful in order to design a lab test that measures a stove in conditions close to the ones observed in the field.
Up to now, measuring instant firepower in the field required to either look at CO2 and CO emissions or to place a scale directly below the stove to estimate the fuel burn rate. These methods are quite invasive and costly, limiting the number of measurements that could be done and potentially creating some bias.
We explore here a novel firepower determination method. Data logging scales with a high refresh rate enable us to capture each refueling event. In addition, we use the stove temperature profiles measured by temperature sensors to validate our assumptions on the burn rate of each refueling event. We present the data collected on about 9,000 uncontrolled cooking tests.

Impacts of a Cookstove, Jet-Flame, and Solar Home Kit

1 - Saturday early afternoon

Measuring adoption in the field

Nordica MacCarty, Grant Ross, Olivier Lefebvre, Alena Morris

The Jet-Flame forced draft cookstove retrofit accessory was recently developed to apply jets of primary air into the fuelbed of biomass cooking stoves to potentially reduce emissions, increase efficiency, and improve cooking time. When paired with a rocket cookstove and solar home power kit including Jet-Flame, 20W solar panel, battery banks, and LED light, a range of improved energy services are provided. The potential impact of this kit relative to the baseline was measured in 40 households in Malawi across four study phases (baseline, stove only, stove plus Jet-Flame kit, and double-stove/double-Jet-Flame). An integrated suite of sensors was used to monitor air quality and technology and fuel usage in the households. Results revealed the median cooking time across all households was reduced by 29% upon introduction of the Jet-Flame, a significant time savings likely appreciated by cooks. Households using the Jet-Flame more than 80% of cooking time showed a 52% reduction in kitchen particulate matter concentrations relative to the rocket stove alone, and a 64% reduction relative to the baseline.

The Chitofu-family for fish-processing is growing and going places

1 - Saturday early afternoon

Field testing

Christa Roth

Find out how the Chitofu-type technology concept for climate-friendly fish processing developed in Malawi and first presented at ETHOS 2020, has now expanded from Malawi into Senegal and Eritrea. Learn how applying a user-centered design approach has helped to mature and diversify the technology to suit user's needs regarding size and mobility as well as the type and amounts of fish to be processed: the new mobile unit from Malawi is a game-changer as it can be shared between users and even travel as flight luggage for easy demonstration of the concept in new places. With GIZ-support 22 aquaculture Fish Farming Groups across Malawi now enjoy the benefits of this mobile Chitofu. In Senegal large smoking applications up to 800 kg of fish are piloted with GIZ Energising Development and their long-time partner CERER. The smokers are promoted under a new local name -- Four Nopalé, meaning 'relax stove'. The COMESA Federation of Women in Business just introduced the concept to Eritrea.

Insulated Solar Electric Cookers (ISECs)

1 - Saturday early afternoon


Orion Barar

Insulated Solar Electric Cookers (ISECs) are an alternative to much of the unhealthy cooking methods used in about a third of the world. Consisting of a solar panel, cookpot, heater and insulation chamber, ISEC is an inexpensive, off-the-grid method to cook, free of pollutants. Direct connect ISECs are cheap and easy to build, while thermal storage ISECs are a bit more expensive and complex, however allowing the user to cook during the evenings and nights. Dr. Peter Schwartz is on Sabbatical in Africa (Uganda, Malawi, Togo, Ghana...) spreading awareness and hosting workshops to teach locals how to build/cook with ISECs.


1 - Saturday early afternoon


Dr. Chris ADAM

Know how about improved charcoal production on a medium scale or semi-industrial scale and under low-cost conditions is still not very much popular technology. We explain 3 different developed units for carbonization which work already with some satisfaction and which are ready for further dissemination.
The most popular is the retort-kiln which is known as the "adam-retort" and which is an approved technology and which is a brick-built masonry kiln.
The 2nd unit will be the lately developed metal Box-Kiln which has some advantages when compared with the steel round kiln.
And last not least we present an open pit drum system which works well with fluffy biomass like coffee husks.

Potential Health and Climate Co-Benefits of Pellets in Ghana

1 - Saturday early afternoon


Prabin Shrestha

Despite the Ghanaian government's master plan to disseminate biomass pellets and stoves to two million households by 2030, neither pellets have been included in Ghana's energy mix nor have their surmised health and climate benefits been empirically assessed. We measured emissions of five different stoves by burning wood, charcoal, and pellets in improved cookstoves and modeled their associated indoor air pollution reduction, personal exposure, health benefits, and climate impact for comparison. The average emission factors in grams per megajoules of useful energy delivered of CO, CO2, and PM2.5 were 3.506, 306.6, and 0.229, respectively, for wood rocket 1 stove; 2.115, 272.8, and 0.256 for wood rocket 2 stove; 4.820, 205.3, and 0.051 for charcoal 1 stove; 4.474, 221.8, 0.043 for charcoal 2 stove; and 0.511, 338.1, and 0.041 for pellet stove. The global warming contribution of pellet stoves was lower than that of charcoal stoves and was influenced by upstream emissions of fuel processing. A complete transition from wood to pellets could significantly improve health with the most benefits for children below five years. To achieve them, the Ghanaian government should foster market enablers for the supply and demand of pellets fuel and stoves and ensure their sustained adoption.

La nueva estufa Justa 3D logra la categoría A en Honduras

1 - Saturday early afternoon

Spanish language session

Anibal, Benjamin Osorto

El trabajo de TW&P y AHDESA es reconocido por su lucha de casi tres décadas en la conservación de los bosques y su uso racional como fuente de energía en países donde se tiene una alta dependencia de la leña para la cocción de alimentos, se ha reducido el uso irracional de la leña mediante la financiación para el diseño, capacitación e implementación de estufas mejoradas Justas en la región Centroamericana.
La alianza entre diseñadores, financiadores y academia ha sido vital para lograr un modelo más eficiente y con un mejor índice de adopción en Honduras siendo necesaria la reingeniería, las pruebas de laboratorio y las usuarias para verificar la eficiencia y el confort que permitiera pasar de una estufa Justa categoría B a una estufa Justa categoría A con su nuevo modelo la Justa 3D.
Al mismo tiempo de trabajar en un modelo más eficiente se ha implementado un proceso sostenible e innovador que contribuye en mayor medida a la mitigación del cambio climático y la generación de empleo e ingresos mediante el desarrollo de una cadena de valor para la comercialización de repuestos, se ha logrado la creación de una red nacional de socios además de otras experiencias compartiremos en nuestra presentación.

Correlate social factors to make decisions in clean cooking

1 - Saturday early afternoon

Spanish language session

Mariana Cerna

In 2012, Microsol created Utsil Naj (UN), the Central American (CA) counterpart of Qori Q’oncha (Peru, 2008), the first programme to generate certified carbon credits through improved cookstoves (ICS). CA bears the lowest electrification rates compared to the rest of Latin America (Dominguez, 2022), mainly in rural areas where woodfuel-energy sources prevail.

UN, our most culturally diverse programme, gathers initiatives in Guatemala, Mexico and Honduras, where up to 54%, 26% and 89% of the population use woodfuel as their primary energy source, respectively (NAMA Facility, 2022; Pérez et al., 2022; Honduras Health Secretariat, 2022).

With diversity comes variability and potential threats to ICS initiatives. Those financed through carbon markets require fine-tuning decision-guidance to produce integral social-environmental impacts. Certification standards, Sustainable Development Goals, Kitchen Performance/Survey Tests, and other steering tools, aid ICS carbon project developers (PD) to choose prosperous intervention areas.

Microsol is working on an emissions-outcome model system, combining woodfuel consumption, ICS good-use practices, models, and community capacity-building. This, integrated with financial models and geodata, could provide constant and updated information on emissions reductions, and social and economic impacts, guiding decision-making in developing ICS projects; Microsol aims to find allies to partner with and carry out this innovative initiative.

Improved stoves adoption drivers in honduran households

1 - Saturday early afternoon

Spanish language session

Victoria Cortes Matamoros

The development of national policies for technological transition, which contributes to energy access and well-being of the population, requires an understanding of the national context, the social and cultural factors that shape the behavior of potential beneficiaries. The results of the level of adoption of improved stoves and the benefits perceived by the users in 207 Honduran households are presented. This evidence shows that there are different levels of adoption, ranging from the complete abandonment of the improved stove, its combined use with other technologies, and its exclusive use. This is linked to the design and compatibility of the technology distributed that meets the expectations of the users, acquisition, monitoring processes, adequate training and awareness of its economic, environmental and social benefits, among others. The collected data highlight the need to modify the scope of current projects by emphasizing on the distribution of technology, strengthening the mechanisms of social approach, training, post-delivery services and improvement of stove attributes that were most valued by users. Furthermore, this approach seek to capture the perspective of the users which is highly relevant for the adoption of new technology.

Reconstruyamos el corazón del Itsmo

1 - Saturday early afternoon

Spanish language session

Anaid González, Vincent Bossy, Edgar Tafoya

Reconstruyamos el cocinado del totopo con un dispositivo que mejora la habitabilidad y economía en el proceso de elaboración y venta del totopo, icono cultural de la alimentación zapoteca elaborado por mujeres de la región del Itsmo de Oaxaca México, para conservar la tradición y contribuir a una revalorización potencial más integral de esta actividad alimentaria y económica milenaria.

How feedback leads to sustained adoption of cleaner cooking

2 - Saturday late afternoon

Measuring adoption in the field

Martha McAlister

Following a rural household air pollution intervention in Ghana, where LPG (propane) cookstoves were distributed to discourage the use of three-stone fires, most recipients stopped using the LPG stove as soon as the subsidized fuel ran out. This is not a unique situation; rather, achieving sustained adoption of cleaner cooking technologies through top-down intervention is notoriously elusive. We used Ghana's Rural LPG Promotion Program as a case study and built a system dynamics model to conceptualize the structure of the complex socio-environmental system in which the program sought to intervene. The model structure was informed by a systematic literature review which identified twelve influential enablers/barriers of LPG adoption in Ghana from ten peer-reviewed articles. The model behavior was validated using data on LPG use over time. We used the model to hypothesize and test (through virtual simulation) how adoption of cleaner cooking practices could be self-reinforced and sustained through systemic feedback processes. Theoretically, these strategies can help actors focus interventions on the drivers of a behavior, rather than the symptoms of or the behavior itself. Future research could investigate the feasibility of the proposed strategies by considering how they could be operationalized or adopted into policies.

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