You guys have to understand what sub-ohm is doing. When going sub-ohm, you are chasing a ‘full cloud’ effect. Your lungs definitely feel the difference when vaping on 1Ω compared to something in the range of 0.2-0.6Ω. What I mean when I say they ‘feel’ the difference is that you are literally pushing more vapor into your lungs. With that said, sub-ohm vapers don’t do mouth to lung inhales, it’s a direct lung inhale.
From my past experiences, coming from a avid tank vaper and going to a sub-ohm vape. I realized that I thoroughly enjoyed having a dense vape go into my lungs. It does take a good day or two of consistent sub-ohm vaping for one to experience and possibly enjoy this effect. The tanks with mouth to lung inhales were not giving me the vape I was looking for. Literally, the point of sub-ohm is to create a denser, cloudier vape. When you think about it, it makes sense. And when you think about why your lungs would resist such an amount of vapor coming from a mouth to lung to a direct lung inhale, makes even more sense. This is the same reason some people prefer to have more percentage of flavoring in their juices compared to someone else who enjoys the same flavor but at 15% instead of 25%.
That fullness that I achieve from sub-ohm vapes is incomparable from something I would receive from a tank system.
Think about this for a second. The more vapor one inhales, means that person is also inhaling more nic, pg, vg, and flavoring. We all know that pg can cause irritation to the lungs/airway for some people. The flavoring’s can also have diktones in them which are also labeled as lung irritants. So when you add all the extra vapor one is getting from sub-ohm, I can see why it would irritate some people that do not sub-ohm on a daily basis.
Example, I have this bakery recipe that is by all means my favorite recipe in the entire world. I mixed 60ml last time I made this juice and the first bottle went in about 2 weeks time. That was with swapping between other juices I like to vape as well. When I got on my second 30ml, I vaped the ever living shit out of it. On the 4th day of busting open the second 30ml bottle, I had about 5ml left if that, lets just say I had sucked it down compared to my first bottle. On that 4th day, I had to put my favorite recipe down, not by choice, but because my airway/lungs feeling very irritated. Again, let me point out that this is a diketone crazy juice. I also had not vaped any other flavors within those 4 days of me vaping the second 30ml.
I’ll wrap this up by saying, I have been very cautious about how much I vape that recipe now. The irritation I felt in my lungs was very unpleasing. I felt exactly as the the person above us posted about their irritated lungs. As @Amy2 said, we have cilia in our air/way that is supposed to act as a filtration system for our lungs, only let air in, and only let air out. The cilia block the unwanted particles before they settle in your lungs. When sub-ohm vaping, if your vapor becomes too hot, I firmly believe that we damage our cilia in the airway. When that damage occurs, this could also be a cause of why someones lungs could be irritated. More unwanted particles being allowed into the airway compared to a ‘non-vapers’ lungs. Mix that with continuous vaping, and one could see why it’s possible to have irritation to the lungs.
Be cautious, as sub-ohm vaping is not for everyone. Experiment at your own risk and I strongly suggest one try sub-ohm vaping first with a diketone free juice, or better yet, a unflavored complete mix. Say a 5ml sample of just nic, vg/pg and see if you even like the vape it produces before you go throwing your favorite flavor on a sub-ohm build. Also, if anyone is curious, I mix every single juice at 20pg/80vg @3mg nic. I would never suggest a high pg build on sub-ohm. That’s asking for irritation because of the amount of PG.
Hope this helps someone!