Stove use was measured in a 200-home randomized cookstove intervention study in Northern Ghana
Stove stacking (use of multiple stoves on the same day) was assessed with both stove use monitors (SUMs), and quantitative surveys.
Homes in the intervention groups given one high efficiency Philips cookstove and one locally made rocket stove, or two locally made rocket stoves most reduced their traditional stove usage.
Traditional stove usage remained high in all groups.