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Me being a welder (namely a mig welder) I know of a similar device somewhat similar to yours. Only it works in reverse:
In mig welding an inert gas is blown over your work as the flux. In most cases these days they use co2 (cheap) When co2 is discharched at a given rate through a regulator, the regulator will freeze up causing damage to the regulator. Enter the heating element inside the regulator to stop this happening. Relatively recently, someone came up with a totally new concept: A special shaped regulator comprising of a block of aluminium with fins on it. This allows the ambient air to 'heat' the co2 as it runs through the regulator eliminating the freezing up. It still runs very cold: only a few deg above freezing, but it's enough to stop this problem. Enter the heaterless gas regulator.
It's all very interesting! (sorry if I've gone off subject/topic etc lol.
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