I think that the Haze is using a hybrid conduction/convection design even when using cans. And that's what makes this vape special in many ways. It does a much better job than a standard convection vape.
On level 1 it's extraction is near perfect for me, and packing the can very light and near full,( leave a little room around the the out put off the can) gives some fantastic flavour.
I have about 10 stainless steel cans, and keep rotating them through usage, this has kept the cleaning to the minimum. And about every 6 uses, goes thru an ISO dip for an hour or more, and then easily wipe clean with as tissue.
To those who haven't tried putting the can on a very slight angle this has made the Haze almost perfect in draw restriction for me, and I recommend this technique again.
I would think some importing upgrades for the Haze 4, (if it happens)would be a double tap of the button to turn on/off, this would save me having to pop the battery. And I would really want to see is an all stainless steel path to the glass mouth piece, including an upgraded nylon opening mechanism (not plastic) this would make this thing as tough as at could possibly be. And i would buy it for sure.
But I'm just Haze dreaming, I think.
But don't let my my wanting updates put you off a purchase, in its current form the Haze dual 3 rocks. And will save your priceless precious lungs, from the dreaded damage combustion causes.