Testing in the Laboratory
Tests were conducted in several different ways. Here are some key results:
- Maximum firepower: 10.6 kW (36,000 Btus). For comparison, a standard gas burner produces 9,000 to 11,000 Btus.
- Fastest cooking: 12 minutes to boil 5 liters (1.3 gallons) of water
- Able to burn dried cow dung at high firepower with no other biomass needed to maintain the fire
- Efficiency as high as 34%, and emissions on par with market-leading stoves (see below for details)
Comparative test results are shown below, using the 5-tier system (0 worst, 4 best) established under cookstove testing protocols. We have included a small sample of competing stoves (the Envirofit M-5000 is one of the most widely distributed clean cookstoves worldwide). The Level Market provides an excellent overview of cookstoves available today.
Original testing data can be found at the following links:
Ganesha Stove: maximum firepower test, complete test
Envirofit M-5000 (natural-draft rocket stove)
Envirofit Econofire (natural-draft rocket stove)
EcoZoom Relief (natural-draft rocket stove)
CRT/N RSMS2 (natural-draft rocket stove produced for use in Nepal)
ACE 1 (forced-draft pellet gasifier stove)
We included the ACE 1 stove in this table to show both ends of the spectrum, from the $12 Ganesha stove to the $100 ACE 1. While the Ganesha stove and the other 4 cookstoves above are natural-draft stoves designed to burn wood and other biomass, the ACE 1 is a forced-draft (fan-powered) stove designed to burn pellets made of wood or agricultural waste. While the performance of this stove is high under testing protocols, a recent study raised the concern that forced-draft stoves can generate tiny particles that travel deep into the lungs, which is implicated in lung cancer.