The Artisan 6 which I am using to roast with, the heat and the loft / air are two totally different controls.
You put your beans in, you adjust your loft to get the beans moving where you want them, you may need to tweak a few times during the roast due to them lofting more as they smooth out during roast etc etc.
You adjust the heat with a rheostat to where you want it at. I have a wattmeter on mine, and it has a built in thermometer. I can dial it in to probably 10 to 20 watts if I fiddle enough with it. I have posted a few videos of me roasting on the thing in case anyone is interested. Need more heat, turn the knob up, need less, turn it down.
https://bit.tube/play?hash=QmfVWNLmATFGjC1TtgxVyskMV2XJcYspFRJMM9M3uwyYeS&channel=24261Fan and heat fully controllable.
Needless to say, I like the Artisan 6.
Also, for those with their own websites etc and interested in the BitTube Monetization thing, you can go here to get more info as well.
https://bittubeapp.com?ref#!2JP398B04great alternative for those who like to post vids and are tired of youtube screwing or censoring them.
I do not think they are doing the Artisan 6 anymore, they have a 3.5 which is a bit smaller and works the same, and a 9 which is much larger and does the same really. The 6 can roast down to 8 oz and up to id say 7 Lbs I put in it though it's rated for 5, with it's power handling it can easily do more.
Aaron