I use a Tinymight 2 which I got from asiavape.co It uses hot air to extract active compounds from the herb. I hate smoking but find vaping with this device with very small amounts of herb and a low temperature setting to be agreeable with my lungs.
One huge factor is the quality of weed itself. If it is good, organic, or has been properly flushed it will not cause discomfort.
The cool thing about this device is that I can put 0.01 grams (like one literal trichome) in the herb chamber, and vaporize only that. It takes microdosing to a whole new level, helps conserve weed, and also is way easier on the lungs...