Wisdom Stove M2

Wisdom Stoves

Wisdom Stove M2 is a natural draft gasifier that has the capacity to use in a continuous process both dry biomass and its formed char as cooking fuels.

Snapshot
Manufacturing & delivery
Performance & use
Research & standards
Feedback

Product description Brand name and product description

The Wisdom Stove M2 is a top lit up-draft gasification cookstove designed to burn different types of biomass such as wood, corn, husks, cow dung, coffee husks and dried biomass briquettes. The product was designed by Wisdom Stoves and is manufactured and distributed by Wisdom Innovations.

Target region(s) Target region for distribution/implementation (listed by country if specified)

Kenya and Zimbabwe.

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"

Wisdom Innovations.

Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

35 – 39 USD.

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

Top lit up-draft gasification cookstoves or TLUDs such as the AGNI Star Rice Husk Gas Stove, SeaChar Deluxe Estufa Finca Farm Stove, and TLUD Champion. Almost 20 competitive cookstoves can be found in the Clean Cooking Catalog.

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

Goal 7: Ensure access to affordable reliable sustainable and moder energy for all.

Target user(s) Target user/consumer base (country, income segment)

Women and children who use open fire as their cooking method.

Manufacturing/building method(s) Detail regarding solution production or construction method (instructions, mass production capacity, custom made,etc...)

The Wisdom Stove M2 is manufactured by Wisdom Innovations. The cookstove is made with locally available materials and manufactured by a locally trained workforce in North Kinangop, Kenya. All of the stoves components are manually manufactured, including the outer cylinder, fuel cylinder, concentrator lid, riser and handles. Most of the M2 components are constructed with mild, galvanized or stainless steel metal sheets except the ceramic insert.

Product Intellectual Property Open source/IP protected (note patent)/trade secret/other?

Trademarked.

User Provision Model Where can the product be purchased/acquired by end users?

Wisdom Stoves M2 are distributed through microfinance institutions, SACCOs, dairy co-operatives/societies and other organized groups.

Distribution to date Number of units that have been deployed, downloads or users to date

Exact number unknown, however according to wPOWER some 3,700 stoves have been sold across four counties in Southwest Kenya: Kiambu, Nyandarau, Narok, and Nakuru.

Fields marked are sourced values that have been evaluated by the manufacturer or a third party, all others are design specifications.

Fuel type

What fuel type the stoves uses

Wood, corn, husks, cow dung, coffee husks and dried biomass briquettes

Chimney (yes/no)

Does the stove have a chimney?

Forced or passive

Whether the stove is forced draft or passive

Pot type

What pot type(s) the stove can accommodate

Flat and round bottom

Thermal efficiency (%)

The efficiency in terms of heat delivered to pot compared to overall heat produced through combustion

26.65

PM emissions (g/MJ delivered to pot)

PM2.5 emissions of the stove per MJ

246.0

CO emissions (g/MJ delivered to pot)

CO emissions of the stove per MJ

0.966

Pot capacity (L)

The capacity of the pot the stove can accommodate

Time to boil (min/L)

The amount of time it takes to bring XL of water to a boil; Format: X mins per X L

Cold start: 19 Hot start: 16

Design specifications Component and Operation overview including power, portability, facility requirements, preventative maintenance and user training requirements

The Wisdom Stove M2 is a Top-lift updraft gasifier and it’s design is primarily composed of two concentric cylindrical containers. The inner container is the fuel cylinder and has holes that function as primary air inlets to gasify the fuel, while the outer container serves as a structural component and has another set of holes that function as secondary air inlets to burn the fuel gas. The M2 is a natural draft cookstove, primary and secondary air required for combustion are circulated naturally. The design also includes a ceramic insert to retain heat.

Specifications:

Maximum Pot Capacity: 15 L

Dimmensions (l/w/h): 280/280/430 mm

Product schematics Design and assembly illustrations

Technical support Technical support provided by

User manual of the stove is available in both English and Kwahili. It is possible to contact local technicians through a customer care line.

Replacement components Availability of replacement components (in-country, by order,...)

Contact the manufacturer.

Lifecycle Disposal and warranty

5 years.

Manufacturer specified performance targets Designer / Manufacturer specified targets

Designers specified performance targets include cooking and production of charcoal simultaneously, reduction of harmful smoke, environmental conservation awareness and cost savings in fuel consumption.

Vetted performance Findings of manufacturer evaluations or independent testing centers

The Department of Chemistry Laboratories from the University of Nairobi conducted the approved simulation of the cooking process, the Water Boiling Tests (WBT). The tests showed average values for the measures of:

How efficiently a stove uses fuel to heat water in a cooking pot.
Quantity of emissions produced while cooking.

The Partnership on Women’s Entrepreneurship in Renewables (wPOWER), under their “Where are the women in the energy sector” series, developed a case study on a six-month project undertaken by Wisdom Innovations. wPOWER stated the key findings on Wisdom Innovation’s performance as:

Women play a critical role as key drivers in the household clean energy supply chain.
Recruitment of women as local sales and customer service agents provides insight into the local dynamics of the communities they work in.
Working with established women’s networks promotes sustainable adoption of clean energy technologies.
Providing access to affordable finance is essential in ensuring clean cooking solutions are made available to low-income households.

Testing organizations Independent lab, academic research centers, etc.

Unviversity of Nairobi as one of Global Alliance for Clean Cookstoves Kenyan Regional Testing and Knowledge Centers (RTKCs). The Partnership on Women’s Entrepreneurship in Renewables (wPOWER).

Safety Potential hazards / risks related to operation of this product

The safety concerns associated with the usage of biomass burning cookstoves are primarily related with carbon dioxide, carbon monoxide and sulfur dioxide emissions.

Another significant safety concern is domestic accidents such as accidental burning or spill-overs.

Complementary technical systems Performance of this product is improved with another technology (eg. Cookstoves and Wind-blocking skirts)

None.

Academic research Academic research related to the product (e.g. published papers in peer-reviewed journals)

Ehrensperger, A., Gatimu, J., Willi, S., Kitala, J., Okoko, A., Shuma, J., Sago, S., Kiteme, B., Wymann von Dach, S. 2017. What future for cooking with solid biomass? The benefits of improved stoves and micro-gasifiers. ProBE Policy Brief 1.

Tryner J, Willson B, Marchese A. 2014. The effects of fuel type and stove design on emissions and efficiency of natural-draft semi-gasifier biomass cookstoves. Energy for Sustainable Development, 23: p. 99-109.

2017. Advanced biomass cookstove distribution. Winrock International.

2018. Wisdom Innovations Case Study: Where are the women in the energy sector?. Partnership on Women’s Entrepreneurship in Renewables.

Compliance with regulations Product certifications and standards referenced by designer/manufacturer

Complies with the following cookstoves rating for the International Workshop Agreements as a streamlined process of the International Organization for Standarization (ISO) :

Tier 2 for emissions.
Tier 1 indoor emissions.
Tier 2 for safety.

Evaluation methods Evaluation methods/protocols/guidelines referenced by designer or manufacturer.

Water Boiling Test 4.2.3.

Other information

Wisdom Stoves has another top lit up-draft gasification stove design called Malakai Jiko or MJ.

In context photographs (0)

You can use the form below to contribute a photo of this product.

In context files & documents (0)

Feedback from users, customers & distributors

Please let us know your experience in using this product through comments below.

Snapshot

Product description Brand name and product description

Target region(s) Target region for distribution/implementation (listed by country if specified)

Kenya and Zimbabwe.

Distributors/implementing organizations Organization(s) distributing/deploying this product directly to communities/individuals?"

Wisdom Innovations.

Market suggested retail price Price per unit or service price per usage/terms (USD). Subsidies noted.

35 – 39 USD.

Competitive landscape Similar products available on the market. May not be a comprehensive listing.

SDG targeted United Nations Sustainable Development Goals (SDGs) targeted with this product/application/service

Goal 7: Ensure access to affordable reliable sustainable and moder energy for all.

Target user(s) Target user/consumer base (country, income segment)

Women and children who use open fire as their cooking method.

Manufacturing & delivery

Manufacturing/building method(s) Detail regarding solution production or construction method (instructions, mass production capacity, custom made,etc...)

Product Intellectual Property Open source/IP protected (note patent)/trade secret/other?

Trademarked.

User Provision Model Where can the product be purchased/acquired by end users?

Wisdom Stoves M2 are distributed through microfinance institutions, SACCOs, dairy co-operatives/societies and other organized groups.

Distribution to date Number of units that have been deployed, downloads or users to date

Exact number unknown, however according to wPOWER some 3,700 stoves have been sold across four counties in Southwest Kenya: Kiambu, Nyandarau, Narok, and Nakuru.

Performance & use

Fields marked are sourced values that have been evaluated by the manufacturer or a third party, all others are design specifications.

Fuel type

What fuel type the stoves uses

Wood, corn, husks, cow dung, coffee husks and dried biomass briquettes

Chimney (yes/no)

Does the stove have a chimney?

Forced or passive

Whether the stove is forced draft or passive

Pot type

What pot type(s) the stove can accommodate

Flat and round bottom

Thermal efficiency (%)

The efficiency in terms of heat delivered to pot compared to overall heat produced through combustion

26.65

PM emissions (g/MJ delivered to pot)

PM2.5 emissions of the stove per MJ

246.0

CO emissions (g/MJ delivered to pot)

CO emissions of the stove per MJ

0.966

Pot capacity (L)

The capacity of the pot the stove can accommodate

Time to boil (min/L)

The amount of time it takes to bring XL of water to a boil; Format: X mins per X L

Cold start: 19 Hot start: 16

Design specifications Component and Operation overview including power, portability, facility requirements, preventative maintenance and user training requirements

Specifications:

Maximum Pot Capacity: 15 L

Dimmensions (l/w/h): 280/280/430 mm

Product schematics Design and assembly illustrations

Technical support Technical support provided by

User manual of the stove is available in both English and Kwahili. It is possible to contact local technicians through a customer care line.

Replacement components Availability of replacement components (in-country, by order,...)

Contact the manufacturer.

Lifecycle Disposal and warranty

5 years.

Manufacturer specified performance targets Designer / Manufacturer specified targets

Vetted performance Findings of manufacturer evaluations or independent testing centers

How efficiently a stove uses fuel to heat water in a cooking pot.
Quantity of emissions produced while cooking.

Women play a critical role as key drivers in the household clean energy supply chain.
Recruitment of women as local sales and customer service agents provides insight into the local dynamics of the communities they work in.
Working with established women’s networks promotes sustainable adoption of clean energy technologies.
Providing access to affordable finance is essential in ensuring clean cooking solutions are made available to low-income households.

Testing organizations Independent lab, academic research centers, etc.

Unviversity of Nairobi as one of Global Alliance for Clean Cookstoves Kenyan Regional Testing and Knowledge Centers (RTKCs). The Partnership on Women’s Entrepreneurship in Renewables (wPOWER).

Safety Potential hazards / risks related to operation of this product

The safety concerns associated with the usage of biomass burning cookstoves are primarily related with carbon dioxide, carbon monoxide and sulfur dioxide emissions.

Another significant safety concern is domestic accidents such as accidental burning or spill-overs.

Complementary technical systems Performance of this product is improved with another technology (eg. Cookstoves and Wind-blocking skirts)

None.

Research & standards

Academic research Academic research related to the product (e.g. published papers in peer-reviewed journals)

2017. Advanced biomass cookstove distribution. Winrock International.

2018. Wisdom Innovations Case Study: Where are the women in the energy sector?. Partnership on Women’s Entrepreneurship in Renewables.

Compliance with regulations Product certifications and standards referenced by designer/manufacturer

Complies with the following cookstoves rating for the International Workshop Agreements as a streamlined process of the International Organization for Standarization (ISO) :

Tier 2 for emissions.
Tier 1 indoor emissions.
Tier 2 for safety.

Evaluation methods Evaluation methods/protocols/guidelines referenced by designer or manufacturer.

Water Boiling Test 4.2.3.

Other information

Wisdom Stoves has another top lit up-draft gasification stove design called Malakai Jiko or MJ.

Feedback

In context photographs (0)

You can use the form below to contribute a photo of this product.

In context files & documents (0)

Feedback from users, customers & distributors

Please let us know your experience in using this product through comments below.

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In context photographs (0)

In context files & documents (0)

Feedback from users, customers & distributors