Abstract: An inflatable, portable treatment device for the treatment of an item, such as fumigation and/or extermination of vermin creature. The item is to be placed in an inner area of the inflatable bladder. A fan positioned in the inner area may propel a chemical agent in the interior area. According to certain embodiments, a heating element may increase the temperature of the interior area. A power cord for the fan or heating element may be plugged into an electrical extension assembly that is connected to the treatment device and is configured to prevent or minimize gas and/or fumigant and/or pesticide vapor from escaping from the inner area. The opening may be sealed by closing an air seal. An airway assembly may be attached to the treatment device to deliver gas from a gas delivery source, such as a blower or gas tank, into the interior area.