Ozone vacuum-ultraviolet (VUV) ozone generators, employ a light source that generates a narrow-band ultraviolet light, a subset of that produced by the Sun. The Sun's UV sustains the ozone layer in the stratosphere of Earth. UV ozone generators use ambient air for ozone production, no air prep systems are used (air dryer or oxygen concentrator), therefore these generators tend to be less expensive. However UV ozone generators usually produce ozone with a concentration of about 0.5% or lower which limits the potential ozone production rate. Another disadvantage of this method is that it requires the ambient air (oxygen) to be exposed
Zombies of the Stratosphere Man back-pack and helmet, used for the first time in this serial, is a two-way radio about the size of a lunchbox; Larry Martin wears it hanging heavily from his belt when dressed for flying. This radio is also seen in some stills of Cody in "". As most flying sequences are reused stock footage from earlier Rocket Man serials, the radio usually disappears when Commando Cody is in flight. Martin also uses an ordinary police revolver instead of the ray gun favored by Cody in earlier and later serials. "Zombies of the Stratosphere" was budgeted at $172,838, although the