A vaporising apparatus, comprising: an air or gas operated pump that is configured to be in fluid communication with a source of a chemical agent via a first conduit; a mixing chamber, wherein: the pump is in fluid communication with the mixing chamber via a second conduit; the mixing chamber comprises: an elongate body portion comprising: a first end; and a second end; and a neck portion extending outwardly and substantially perpendicularly from the elongate body portion adjacent to the first end thereof; and the second conduit is configured to enable transport of the chemical agent into the mixing chamber via a first chamber entrance located at the neck portion; the first chamber entrance comprises a nozzle that is configured to atomize the chemical agent prior to entry to the neck portion; and a heater that is configured to: be in fluid communication with a gas stream; and to heat gas to produce a hot gas stream; wherein: the heater comprises an outlet in fluid communication with a second gas conduit, the second gas conduit separating into two separate channels to split the hot gas stream into a first hot gas stream and a second hot gas stream; the first hot gas stream is directed into the mixing chamber at the first chamber entrance; the second hot gas stream enters the mixing chamber via a second chamber entrance located at or adjacent to the first end of the mixing chamber; the first hot gas stream contacts the chemical agent in the neck portion of the mixing chamber, vaporising at least part of the chemical agent to form a vaporized chemical agent; and the vaporized chemical agent travels towards the elongate body portion to meet and intersect the second hot gas stream. an air or gas operated pump that is configured to be in fluid communication with a source of a chemical agent via a first conduit; a mixing chamber, wherein: the pump is in fluid communication with the mixing chamber via a second conduit; the mixing chamber comprises: an elongate body portion comprising: a first end; and a second end; and a neck portion extending outwardly and substantially perpendicularly from the elongate body portion adjacent to the first end thereof; and the second conduit is configured to enable transport of the chemical agent into the mixing chamber via a first chamber entrance located at the neck portion; the first chamber entrance comprises a nozzle that is configured to atomize the chemical agent prior to entry to the neck portion; and the pump is in fluid communication with the mixing chamber via a second conduit; the mixing chamber comprises: an elongate body portion comprising: a first end; and a second end; and a neck portion extending outwardly and substantially perpendicularly from the elongate body portion adjacent to the first end thereof; and an elongate body portion comprising: a first end; and a second end; and a first end; and a second end; and a neck portion extending outwardly and substantially perpendicularly from the elongate body portion adjacent to the first end thereof; and the second conduit is configured to enable transport of the chemical agent into the mixing chamber via a first chamber entrance located at the neck portion; the first chamber entrance comprises a nozzle that is configured to atomize the chemical agent prior to entry to the neck portion; and a heater that is configured to: be in fluid communication with a gas stream; and to heat gas to produce a hot gas stream; be in fluid communication with a gas stream; and to heat gas to produce a hot gas stream; wherein: the heater comprises an outlet in fluid communication with a second gas conduit, the second gas conduit separating into two separate channels to split the hot gas stream into a first hot gas stream and a second hot gas stream; the first hot gas stream is directed into the mixing chamber at the first chamber entrance; the second hot gas stream enters the mixing chamber via a second chamber entrance located at or adjacent to the first end of the mixing chamber; the first hot gas stream contacts the chemical agent in the neck portion of the mixing chamber, vaporising at least part of the chemical agent to form a vaporized chemical agent; and the vaporized chemical agent travels towards the elongate body portion to meet and intersect the second hot gas stream. the heater comprises an outlet in fluid communication with a second gas conduit, the second gas conduit separating into two separate channels to split the hot gas stream into a first hot gas stream and a second hot gas stream; the first hot gas stream is directed into the mixing chamber at the first chamber entrance; the second hot gas stream enters the mixing chamber via a second chamber entrance located at or adjacent to the first end of the mixing chamber; the first hot gas stream contacts the chemical agent in the neck portion of the mixing chamber, vaporising at least part of the chemical agent to form a vaporized chemical agent; and the vaporized chemical agent travels towards the elongate body portion to meet and intersect the second hot gas stream.