FWIW, I'm not a placebo responder, nor allergic to anything but heavy pollen/dust.
Just wanted to report that after using Kanthal A1 wire with no issues for years,
not quite as clear as mountain air, but no significant obstruction or tightness, I
tried Tempered Nickel 200 wire for TC, and after a couple of weeks I developed
irritation/pain in the chest that got me to the ER, worried about a possible cardiac
problem. That was negative, thankfully. And no "allergic" symptoms either, no
rash, no swelling. But there are cases of systemic allergic reactions, so who knows.
Since yesterday I've been trying 2 kinds of Grade 1 (allegedly) Titanium wire,
all these wires BTW are around 26-28 AWG, and I feel like the heaviness in
the chest I was feeling with Nickel is not there with Titanium. I'm going to drop
NIckel entirely for now.
No idea what's going on. I'm just reporting a personal experience.
It feels real enough for me to avoid vaping Nickel. If you feel tight in the
chest with Nickel, try Titanium, and decide. YMMV.
I was never very happy with the old nichrome atomizers, for many reasons,
but had nothing to compare to back then.