This query is extraordinarily critical for me? I know if someone builds a fire in a place that within...

I know if someone builds a fire in a place that within is not a way for gas to outside (even for a time way), he will be die.
now i want to know if someone builds a fire (nor big fire nor small fire) within a place with this volume: 110cm * 156cm * 182cm after how heaps hours he will be die?
Answers:    He will die in minutes from the smoke.

If we humiliate the smoke and just look at the amount of oxygen person used up by the fire, I still think he would die inside the hour easily.

What a, um, strange press...
The fire will self extinguish with smaller amount than 20% oxygen. A person can survive next to 17% oxygen. The fire will go out okay before the party perishes due to lack of oxygen.
Most culture that perish during a fire will expire due to smoke inhalation. If the fire is large satisfactory to consume all the available oxygen, the individual will expire from excessive heat wreck and not from lack of oxygen.
So your plan to smother a smoker surrounded by a grave will reveal intent to murder with a toxic weapon - the shovel and a cigar.