Berkeley Air was part of a consortium of partners exploring the effective promotion of ethanol-mathanol fuels for use in cooking in Western Africa. In-home field assessments were undertaken in an experimental sample of 30 households for up to 6 months. A combination of sensor-based stove-use measurements, canister refill monitoring, and household surveys were usedto measure uptake, use, and acceptability of the CleanCook.The evaluation also included performance testing of both the CleanCookwith the ethanol-methanol fuel and a local kerosene stove conducted at the National Center for Energy Research and Development (NCERD) laboratory at the University of Nigeria, Nsukka, to estimate emission factors/rates and fuel efficiency.