Aprovecho Research Center
Designed by EcoZoom, Dura is a rocket-type stove for cooking with wood, charcoal and biomass briquettes.
Dura is a lightweight, durable and rocket-type cookstove designed for cooking with a single pot and wood or solid biomass as fuel. Within a long-lasting refractory metal combustion chamber, it has a strong cast iron top, ceramic insulation and steel handles with silicone grips for easy movement and transportation.
Countries: Bangladesh, Canada, Costa Rica, France, Germany, Ghana, Guatemala, Italy, Japan, Kenya, Namibia, Nigeria, Papua New Guinea, Peru, Philippines, Rwanda, South Africa, South Korea, Spain, United Arab Emirates, United Kingdom, United States.
Goal 7: Ensure access to affordable, reliable, sustainable and modern energy for all.
Individuals and families in developing countries in need of eco-friendly and efficient cooking products.
The exact number of Dura stoves distribution to date is unknown, however, EcoZoom has a production volume capacity of 60,000 stoves/month (considering all commercialized models) that can be scaled to fit any project.
What fuel type the stoves uses
Does the stove have a chimney?
Whether the stove is forced draft or passive
What pot type(s) the stove can accommodate
The capacity of the pot the stove can accommodate
The efficiency in terms of heat delivered to pot compared to overall heat produced through combustion
PM2.5 emissions of the stove per MJ
CO emissions of the stove per MJ
The amount of time it takes to bring a specified amount of water to boil
Design specifications include a refractory-metal combustion chamber, lightweight and ceramic-abrasion resistant insulation, body painted sheet metal with a reinforced door frame, bottom tile kiln-fired with metal lining and stainless-steel handles with silicone. Dura stove weighs 8 kgs and its dimensions are (LxWxH) 24 x 24 x 33 cm.
Further details here.
This stove has 1-year warranty including defects in materials and workmanship. Dura stove has a 5-year estimated lifecycle.
The EcoZoom Dura rocket stove was designed to burn wood and other solid biomass fuel with a durable and lightweight product that can also be used for camping and off-grid cooking.
With a skirt, Dura stove has a thermal efficiency of 38%, an average fuel savings of 53% and emissions savings of 72%. When tested without a skirt, it proves a thermal efficiency of 27%, an average fuel savings of 43% and emissions savings of up to 55%.
The complete vetted performance here.
Results from DelAgua’s testing in Rwanda show that follow-up surveys conducted by local Community Health Workers 1 month, 3 months and 6 months after stove placement show that 95% of recipients now use EcoZoom as their primary cooking method.
EcoZoom with the Aprovecho Research Center.
Designed for outdoor use only. Keep all flammable items away from the surrounding area of the stove, and do not enclose the area you are cooking within; proper ventilation is always required. Do not touch the body of the stove while in use.
Use of the product with a pot skirt significantly increases the efficiency and overall performance of the cookstove.
Jetter, J.J., Kariher, P (2009). Solid-fuel household cookstoves: characterization of performance and emissions. Biomass and bioenergy. 2009;33:2294-305
Jetter, J., et al (2012). Pollutant emissions and energy efficiency under controlled conditions for household biomass cookstoves and implications for metrics useful in setting international test standards. Environ. Sci. Technol. 2012;46(19):10827-10834.
Anenberg, S.C., et al (2013). Cleaner cooking solutions to achieve health, climate, and economic co-benefits. Environ. Sci. Technol. 2013;47(9):3944-3952.
Lab Design & Testing: Functional prototypes are created and tested in a lab in partnership with the Aprovecho Research Center and by third-party experts to ensure they provide an efficient and safe cooking experience. Aprovecho tests all EcoZoom stoves in the lab before they are taken into the field to ensure they are fuel efficient and emissions efficient. Stoves have also been tested by the US Environmental Protection Agency. Some reports available upon request, others are confidential as requested by the testing entity. The Zoom Dura was tested by DelAgua, who piloted over 2,000 of the cookstoves in rural Rwanda and conducted extensive monitoring and evaluation to test end user uptake.
Ecozoom indicates that they use the standard laboratory test conducted for cookstoves – the 5-liter Water Boiling Test (WBT). The WBT is a laboratory-based test that can be used to measure how efficiently a stove uses fuel to heat water in a cooking pot and the quantity of emissions produced while cooking. This test can be used to evaluate stove changes during development, compare the effectiveness of different designs, select the most promising products for field trials, and ensure that manufactured stoves meet the intended performance.
Ecozoom also follows a 5-step design process before introducing stoves into developing markets to ensure adoption.
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