[Stoves] clay mortar versus cement mortar in stoves

[Crispin]

Dear David

Esperanza is the name of the Tea Estate that has agreed to build the stoves 
in the workers' houses.  They have quite a low budget and they did not want 
a portable stove.

With an upper limit of $10 installed, it was felt that a basic stove with 
options could fit the bill.  The possibility of a metal skirt remains open 
as the $5 cost leaves some room for metal.  It is the extraordinarily low 
cost of local bricks that makes it possible (less than 1 cent US$ each).  We 
will be introducing a new concept in heat transfer efficiency as soon as 
possible.  The combination may outperform some well known improved stoves.

There is enough budget left to think about putting in a metal grate to allow 
a slightly higher fuel loading than a Rocket Stove which will lower the 
attention demand on the cook.

I like the fact that the entrance channel is strong enough to use as a wood 
breaking tool.

Regards
Crispin



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