There are several different designs of Venturi cold smoker.
Most famous shall be Smokey Daddy.
But Smokey Daddy can not burn saw dust.
Saw dust does not leave enough free pass for fresh air to pass though.
This Revised Venturi Cold Smoke Generator adds a perforated pipe in the center, which forms a duct for fresh air to pass through.
REVISED Venturi Cold Smoke Generator
is made from Stainless Steel pipes and can burn wood chips, pellet, branches, and SAW DUST. Fan Speed can be tuned steplessly by AC/DC adapter.
Size Dia.3 1/2" X 12" Long
Price $99 plus free mail door to door for Australian and North American market.
European market adds extra $15 mail cost.