Table 3.

Convenience, difficulties and suggested modifications from the improved cookstove (ICS) field test, by stove type, in rank order (top is highest rank).

Stove Model	Convenience	Difficulties	Modifications
Envirofit B-1200 wood (black)	Overall good	Blackens (chars) pots to some extent	Make it a two-burner
	Food tastes good	Requires smaller firewood	Make the mouth broader
	Requires less fuel
	Produces less smoke
	Appropriate height
	Very easy maintenance
	Safe to use
Envirofit G-3300 Wood (red)	Overall good	Little too high	Make it a two-burner
	Requires less fuel	Narrower mouth unable to fit usual firewood	Increase broadness of mouth
	Produces less smoke	Takes longer time to get cool	Reduce the height
	Good taste
	Portable
	Easy maintenance
	Safe to use
Onil Plancha stove	Overall good	Big size needing more space	Increase mouth size to get enough air to ignite quickly
	Food tastes good	Takes more time to ignite
	Requires fuel less	Needs straight firewood and small twigs
	Produces smoke less		Reduce the overall size
	Does not blacken utensils
	Height okay
	Easy maintenance
	Two burner save time
	Safe to use
	Suitable for pressure cooker
Purti pellet	Overall good	Requires special fuel (pallets) unavailable in village	Increase the battery life
	Food tastes good	Costs additional to buy pallet	Increase mouth size
	Requires less fuel	Requires daily battery recharge
	Produces less smoke	Requires kerosene to ignite
	Height okay	Suitable only for small households
	Easy maintenance
	Less blackened utensils
	Safe to use
Greenway Grameen	Foods taste good	More time consuming	Make it a two-burner
	Easy maintenance	Requires intense attention	Reduce the height
	Suitable for pressure cooker	Needs more fuel than other improved stoves
	Safe to use	Need small size firewood
		Suitable only for nuclear families
		Overall not a good stove