This is nothing to worry about in this instance. Radiation is a simply any energy* that radiates from a source - in this case, infrared radiation. What we perceive as visible light is also a form of electromagnetic radiation. It's only stuff like hard UV, X-rays and gamma rays that become particularly dangerous as forms of electromagnetic radiation. Microwaves can also present a hazard as they are absorbed by matter (such as living tissue) in ways that cause it to heat up.
[* Plus, of course, nuclear particles like protons, neutrons, electrons (β-particles/'rays'), helium nuclei (α-particles), and cosmic radiation in the form of other nuclei or more exotic forms of subatomic particle.]
The main question about infrared heating is whether you're intending to use the device to heat air, which would strike me as possibly rather inefficient, as nitrogen and oxygen will only have a few narrow, weak absorption bands:
Nitrogen, the principle component of air, absorbs barely any infrared at all.
As mentioned in a previous post, my view is that you would be better off heating (either with whatever radiative hob you have, or, more efficiently, with induction) some kind of heat sink/radiator - something which, ideally, has a precisely known heat capacity and similarly understood thermal transfer ability. This way you can achieve an optimal balance of heat-up speed and temperature stability.
Yeah, it has a glass top, the blurring of the element's glow gives me the firm impression of that, at least. It wouldn't have an open element, this means it doesn't slowly shed metal oxide fragments into the air stream. Any heating of air produced by this device will, overwhelmingly, be the result of convective transfer from the glass surface [which heats up mostly from blocking the visible light frequencies of the heating element] plus heat transfer from whatever object has been placed upon the hob - the outside of a bottomless kettle would start to get
very hot indeed, I suspect.
You would probably get more effective heat transfer with your bottomless kettle if you were to place it on something like the cake tin base I also previously suggested, or any other flat, circular-ish object to absorb the radiant heat (infrared) - especially if you can find one with a roughly-textured upper surface. This would help to improve convective heat transfer to the air stream. I would therefore suggest, perhaps, a cast iron grill insert, the ones with the ridges - but be sure to avoid PTFE non-stick coatings!