The radiator cover sounds like a good spot if it doesn't get much above 90°. As long as the spot is well-lit, like a E/S/W windowsill, and above 50°, I have theoretical hope but without pics, can't say more than that for your specific leaves. If it has cultivar variegation, that is usually not passed along to the pups and they end up looking different, without the cultivar variegation.
I like an experiment too and do a lot of them. I've already done this one, many times, after seeing others doing it both ways. I documented some of the Sans leaf propagation. Some highlights, ground cuttings over summer were generally slower, but tend to make more babies per leaf:
https://garden.org/thread/view...
https://garden.org/thread/view...
https://garden.org/thread/view...
The yellow pup is no longer with us:
https://garden.org/thread/view...
https://garden.org/thread/view...
https://garden.org/thread/view...
Water prop posts in that discussion start here:
https://garden.org/thread/view...
https://garden.org/thread/view...
https://garden.org/thread/view...
https://garden.org/thread/view...
Some of the jars were left to keep going for 3 years, just water, no soil. Tried putting some leaves sideways in the ground but none of those grew anything.
That whole discussion that has been going for over a decade:
The thread "Sansevieria, greatest house plants alive!!" in
Houseplants forum
Tarev, didn't you have a leaf propagating in gel beads? Sorry if I'm remembering wrong, or the wrong person.