Can you suffocate in a house with closed windows and doors?

Yes, it is possible to suffocate in a house with closed Windows and doors, especially if the space is airtight or if there are limited sources of fresh air. In such conditions, oxygen levels can decrease while carbon dioxide levels increase, leading to asphyxiation. Additionally, combustion appliances can deplete oxygen and produce harmful gases if not properly ventilated. Therefore, it's important to ensure adequate ventilation in enclosed spaces.