Currently there is another formaldehyde scare percolating in the forum based on a claim that coil temps higher than 470 F are bad and even tootle puffers might creat them. What I'm learning from the Arctic Fox firmware is what temp and watts were used for the last puff I took. When my 1.35 ohm stainless coil is saturated I get the vape I want at 250 F, which is 200 F lower than the alleged dangerous temp. Vapers who use Kanthal and power mode and are concerned about this claim could do a TC build that mimicks their power mode build an see what temperatures it's hitting. When i stopped using power mode i was building 1.6 ohm kanthal coils and firing them at 20 watts. The odds are those coils were rarely going above 300 degrees but now anyone with a pico or vtc mini or a bunch of other TC mods can figure out their own situation.
This scare keeps popping up once and awhile. It is pushed hard by a few strongly into TC, including at least one manufacturer it would seem, as a reason why we should all be using TC - or nothing at all.
I don't buy into it myself. I've been tootle puffing for years, only recently getting into rebuilding and using TC builds on TC devices. My MTL vaping has definitely been less harmful to me over the years than smoking would have been instead. I saw general health improvements just within the first weeks of switching, using toppers like the CE4 (the iClear 16) at one point in my vaping life for well over a year, until I eventually upgraded. My general health still improved through that period of time, and now continues to get better - though at a less noticeable rate of improvement.
I was having a hard time getting TC first at right, giving up on it a time or two, but I seem to be getting a better hang of it this time around. I still like my good straight power mode builds as well though - which I am also working to improve.
TC definitely has some advantages when you get it right, but I don't think vastly improving the harm reduction of vaping is necessarily one of them. I could eventually be proved wrong on that. It is hard to tell, just because there is so much bogus vaping science out there - based on hidden political and financial agendas.
My biggest problem with rebuilding, and in turn doing TC builds, was getting the wick right with rayon - which is a bit of a challenge. I also had a hard time with the idea that you could get a good MTL vape off a 0.5 sub ohm coil, and that I did not need to struggle with trying to get above ohm TC builds right - especially since most TC devices don't run well (or at all!) with TC builds above 1 ohm or so. (I still don't know why there is this common limitation. Maybe to save TC algorithm data space on small e-cig chips?)
I also needed to disassemble the two Kayfun Mini V3 RTA clones I use for TC builds, and reassemble them using blue Loctite (thread lock), so as to help prevent loose connection issues I was previously having -that threw my TC vapes way off, enough to constantly frustrate and annoy me. I also upgraded the firmware on both my iStick Pico mods recently, which I think also may have helped.
Since I'm a "tootle puffing" mouth-to-lung style (chain) vaper, I find I'm doing just fine vaping a 3mm ID, 0.5 ohm, 6-wrap, 26 gauge SS 316L wire build at about 12W, with the max temp set to a mere 320F. That's cool, relatively speaking, but still produces nice MTL vapor and flavor. I play around with the settings still, of course, but I'm surprised I don't need to run the setup at 20-25W, with a max temp more like 420-450F like some others do for a satisfying MTL that is supposedly still "cool" running.
Of course, those people may be using something other than an iStick Pico with those settings, so that may make all the difference - along with maybe using a different topper as well. These devices sure do vary a lot in how they do TC.
What's up with this "ArcticFox" people are talking about? Is that some optional firmware you can load onto an iStick Pico, or just some desktop software you can analyze your Pico with? Do you find it necessary, or just nice to optionally have? I'm curious.