brûleur à pot de gazéification à tirage naturel

OBS: Ils [les brûleurs] sont dits: - à tirage naturel si l'air de combustion est aspiré par la dépression créée par le tirage de la cheminée.

CONT: Vaporizing pot-type burners can be divided into two groups: the natural-draft type and the forced-draft type. ... In many instances these natural-draft vaporizing burners are regulated by a simple, float-operated constant-leveling valve equipped with a rotating flow-adjustment device which is turned manually. ... These burners may also be wick-fed or have nothing but a metal vaporizing pot consisting of two or more perforated sleeves. In the latter case, ... this burner is completely dependent upon natural draft for its combustion.
OBS: forced draft: Mechanical draft created by a device upstream from the combustion zone of an appliance to a chimney.