Stove too small or too large for living structure.
Stove too slow to start.
Stove not portable: is lost during moving, or can not be carried to place of temporary work place. ( Mostly roadside jobs and construction sites)
Stove doesn’t work with certain fuels, which are freely available in the area.
Stove too expensive to purchase.
Designs and models “not appropriate”.
Trained workers required for installation.
Potential users not aware of opportunities due to lack of product promotion
Unable to efficient combust the biomass in small scale, overall efficiency near only 23-30%.
Combustion and overall efficiencies of improved stove burning animal dung is generally half of that on biomass and produces lots of indoor pollution.
Many stove designs require user to blow by mouth to supply needed air for initial fire to get started. Making the stove as hard as a 3-stone fire to start burning.
Heat from combustion drives off volatiles from wood faster than they can be combusted.
Fuel is eventually reduced to charcoal, which burns slowly under normal air draft – giving poor combustion performance.
Durability issues due to low cost materials and high temperatures result in the stove being discarded sooner than anticipated.
Some improved stoves (a vented mud stove) were designed for superior heat transfer to the cooking surface. While decreasing wood consumption, they still produce substantial pollution, as they suffered from decreased combustion efficiency.
