In the late 80s I used to know a chap who worked in 'appropriate technology'. He'd worked with the Maasai, as they were abandoning their nomadic lifestyle they were having terrible problems with high CO levels in their homes which were not really suited to permanent stoves, so a suitably versatile stove design with good flue arrangements was urgently needed.
A bit of googling found this, so I'm not imagining it!
Neil