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A method and apparatus for treating a material with gas or vapour, especially a fumigant, comprises a sealable enclosure device, a pump which may have an inlet for the agent and a heat reservoir, and a long flexible hose to allow the enclosure to be evacuated after treatment and the effluent dischar

A method and apparatus for treating a material with gas or vapour, especially a fumigant, comprises a sealable enclosure device, a pump which may have an inlet for the agent and a heat reservoir, and a long flexible hose to allow the enclosure to be evacuated after treatment and the effluent discharged outside the premises where the material is treated.

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A method of fumigating a material with an agent in a gaseous or vapour state, which comprises the steps of totally enclosing and sealing the material within a flexible enclosure device having a port, providing means for supplying the agent to the enclosure device, said means including a pump compris

A method of fumigating a material with an agent in a gaseous or vapour state, which comprises the steps of totally enclosing and sealing the material within a flexible enclosure device having a port, providing means for supplying the agent to the enclosure device, said means including a pump comprising a chamber containing a heat reservoir in the form of a particulate matter, connecting the port to the agent-supplying means, causing the agent to impinge on said particulate matter, fumigating the material within the device with the agent and, after fumigation, pumping any unused agent or gaseous or vaporous reaction products from the device, and transmitting gas or vapour to an outlet in a region remote from the device. Fumigation apparatus which comprises an enclosure device capable of totally enclosing and sealing an article to be fumigated, the device comprising flexible substantially gas and vapour-impermeable base and cover sheet joined by a substantially gas and vapour-impermeable sliding clasp fastener, the interior of the device being connected by a port to an outlet of a pump, the pump having an inlet chamber for containing a heat reservoir of particulate matter, means for introducing a fumigant into the chamber to impinge on particulate matter therein, and an air inlet to the chamber, whereby a mixture of air and fumigant may be introduced into the device.