How long do fumigation fumes last?

How long do fumigation fumes last, fumigation fumes last for duration of fumigation exposure period plus aeration period, typically 48 to 72 hours total, with fumes being strongest during first 24 hours of fumigation and then cleared during aeration. For whole house tent fumigation for termites using Vikane sulfuryl fluoride, home is tented and fumigated for 24 hours, then aeration period of 12 to 24 hours where tent removed and home ventilated with fans, with total time away from home about 48 to 72 hours, after which fumes should be gone and home safe to reenter when cleared by fumigator with gas monitor showing zero. For indoor fumigation for cockroaches or bed bugs using foggers, fumes may last 2 to 4 hours after fogging, requiring ventilation for few hours. So how long do fumigation fumes last, for tent fumigation, fumes last about 24 hours inside tent, then cleared during 12 to 24 hour aeration, total 2 to 3 days before reentry, for indoor bug bomb fumigation, fumes last few hours and clear after 2 to 4 hours ventilation, with lingering chemical odor possibly lasting day or two but not toxic fumes, with company testing air before allowing reentry to ensure fumes gone and safe, so fumes do not last long after aeration if properly ventilated.