vaporizer downstream of the ejector hot gases extracted with an ejector can be used in various applications to avoid contact between a fan and hot reactive gases and to avoid or minimize the use of external heaters to increase gases to a working temperature as in for example a heated seal air system fig2 illustrates the invention installed in an upstream configuration which is usual but not required in an original equipment installation this configuration provides reactive reagent vaporization using hot gas without placing an extraction fan directly in the flow path of the hot gas in the device air at ambient conditions is compressed to 10 psig to 30 psig 69 kpa 207 kpa by a blower 46 one of ordinary skill in the art realizes there are a number of similar compressor or blower devices that can be used in this system during compression the air temperature increases as a function of the temperature of ambient air at the blower intake and blower compression ratio expected air temperature at the exit 47 of the blower compressor is from about 100 u00b0 f to 350 u00b0 f 38 u00b0 c to 177 u00b0 c this u201c warm u201d compressed air is forced through an insulated air pipe 50 to the venturi ejector device 42 u201c motive air u201d input or entry port 48 the warm compressed air passes through the ejector venturi device 42 thereby inducing a vacuum at the ejector u201c suction gas u201d or vacuum inlet port 44 of the ejector device 42 typical hot gas temperature within the exhaust flue 10 will vary between about 500 u00b0 f 260 u00b0 c and 1 100 u00b0 f 593 u00b0 c.