Why choose an External Air wood burning stove as a tent stove?

All the front door air intake wood-burning camping stoves sold in the market are for Outdoor Use Only, there will be safety risks to use these stoves in the tents with limited air ventilation because they are consuming the air that the tents' occupants to breath.

A typical stove can consume between 10 to 20 cubic meters of combustion air every hour and an average 4-person tent has a volume of air around 30 to 40 cubic meters, so it's obvious that a stove operating in a tent could quickly consume up the Oxygen in the tent within 2.5 hours and thus present serious problems for the occupants.

 
An inbuilt external air supply to Winnerwell External Air series stoves—with US and EU Invention Patent—ensures that there's an unlimited flow of fresh combustion air, which eliminate the discomfort of tent's occupants because they are not in competition with the stove for their air.