What is the best way to remove the smoke from the moxibustion device, is it good?

The moxibustion meter is the use of moxa in the combustion chamber combustion of high temperature negative pressure, the smoke through the smoke pipe to the smoke box, because the specific gravity of the smoke is greater than the air, the first to sink to the bottom of the smoke box, after water filtration physical degradation decomposition of tar, the smoke is removed, science and environmental protection.