Vaporization begins at 356 Fahrenheit. I usually run my volcano digit at between 360-365 Fahrenheit. At that temperature the hits are as easy to breathe as air and it gets you fucked up. Sometimes I move up to 375 and thats pretty tolerable but more harsh and it gets you a lil more fucked up. If its a special occassion ill go up to 392 which is smokey but still tolerable and gets you really fucked up. After 392 Fahrenheit it stops being healthy and you might aswell be using a bong. To get the most out of your weed though a bong hit in a bag can be had at 439 Fahrenheit.