Do the bowls have a screen on the top and bottom or is it open? In the picutres I saw it looked like the bowl was just a empty tube with no screens.

I don't have that model but my whip vaporizer has a screen to hold the herb in the right place. My old school conduction vape on the other hand does not have one because there is very little air run over the herb.

But considering that conduction vaporization is the least efficient (about as efficient as a regular bowl of the same size in a bong) you'll probably be running convection vape (as most modern design are) and that works by rushing air over the herb. My guess is the screens are in the device rather than in the tube.

Lol I am aware of that, I have a vaporbrothers I am not completely oblivious to vapes. I am very much aware of the difference between conduction and convection, if you even consider a conduction vape a vaporizer. I am asking specifically to the herbalaire "crucible" does it not have screens on the top and bottom?

The crucible has a screen on the bottom only. The main mouthpiece also has a screen on its bottom, so the herb is trapped between two screens. I've added another screen to the top (just below really) of the crucible when I only had loose herb to load. The screen on the main mouthpiece isn't as fine as the crucible screens, and you don't want finely ground herb working its way past the mouthpiece screen and into the bag. This vape, more than any other, is very efficient with pieces of broken off bud. It gets fully cooked without grinding or breaking into tiny pieces. It does great with ground herb as well, it just gets messy (thus the extra crucible screen) and is not necessary at all.

Thanks thats good to know. I always spend atleast 5 minutes just breaking up bud finely enough for the vapir one. I'm getting really excited about this vape, I just have to sell a couple things on ebay so I can afford another toy. BTW If anyone is interested in a XFX Geforce 6800GT I'm letting it go for $80 shipped. I got it on 4/18/08 from newegg for $90, but it doesn't have a feature that is important to me that my current card has, "play video fullscreen on tv". I'm trying to sell it first on another forum I am part of and have a reputation on.

I'd recommend getting a 4 pack of crucibles and an extra mouthpiece or two with your herbalAire. I've stepped on a couple of crucibles and it's nice to have one loaded and ready to go, even though they cool off pretty fast. You'll also want to watch out for the herbalAire bags. They're a bit thicker than Volcano/Toppits bags and they won't burst if you leave them on too long and they overfill, but they will leak vapor when they're full (like a safety valve), so if you leave the room and lose track of time, you'll return to an empty bag.

I emailed herbalaire directyl and asked about using a higher flow pump. This is there response.

The herbalaire comes with a 1L per minute pump. The pump herbalaire is "experimenting" now with is a 10L per minute pump and a connection to fill two bags at once. But what I want to do is upgrade the pump to a 2L per minute pump. I think that will be a nice combo, the pumps are only $10-$15 and are silent. I think one dense vapor bag is better than two half as dense bags. And I don't think the slightly more air flow of the 2 LPM will after the vapor density too much.

They've been experimenting a long time. They must be busy and only have a few minutes here and there. The company President/designer sent me a 3-way mouthpiece with my unit almost 2 years ago. I've never bought a stronger pump to go with it. I just don't need 3 bags at once often enough to bother with it. I'd rather use different sized bags to get a quicker fill. Let us know how that 2L pump works out (if you can find one). I shopped for pumps and it's frustrating trying to find out exactly how much air they push.

I've found a few pumps online that are about 2LPM. The pump that interests the most is the Dolphin One Star pump. It is rated at 2.5LPM with an adjustable air flow. The pump is said to be virtually silent. How useful the adjustable air feature is another thing. Just finished two bowls out of the vapir one so I'm pretty backed.