What is the Difference Between Conduction & Convection Heating?

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convection heating
conduction heating

Most vaporizers today are either conduction or convection heating but what does this really mean? Well its actually quite simple science. Conduction is heat transferred through an object by direct contact while convection is heat transferred through air or gas. Think of convection as baking. There is no direct contact with a hot coil and the temperature is regulated to prevent combustion.

Conduction heating is commonly used over convection heating considering it is inexpensive and easy to design into a vaporizer. Since it is direct transfer of heat, conduction vaporization typically provides more uniform results and uses less energy to do it. It is Also much easier to regulate temperature to prevent combustion.

Convection heating draws the hot air through the materials extracting the active ingredients used for aromatherapy. Convection is can be a bit challenging because it is dependent on more factors like draw speed, grind of material and packing density of your load. Although providing more control, it is harder to regulate temperate with these factors and therefore easier to combust materials. However, when used correctly, convection vaporizers can provide the best flavor profile and highest quality vapor. Once you become comfortable with your convection vaporizer, they are usually more efficient resulting in less waste of materials.

So How Does This Apply To The Haze Dual V3?

The Haze Dual V3 can effortlessly be used as both convection and conduction by swapping out the screens or the popular material canisters. The Haze screens and canisters provide a unique hybrid experience if used correctly.

The Haze Screens are made of a durable stainless steel mesh and come in 2 variations for your preferred heating method. Firstly, we have the Conduction Screens which are designed with open sides allowing materials direct contact with the oven resulting in thicker more visible vapor. The Convection screens on the other hand are a fully encased screen providing a barrier between the Haze oven wall and materials. The Convection screen efficiently circulate heat through the materials and result in a smoother more flavorful draw.

The Haze Canisters are both conduction and convection heating. Although there is no direct contact to the Haze oven, the stainless steel Canisters which are in direct contact with the material heat to oven temperature resulting in mostly conduction heating. However, the Canisters have airflow through the top and to the side pulling fresh air inside over the materials and assisting in vaporization by convection.

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  • Tony

    I have used Arizer V-tower, Aromed, (used for years now) and Haze version 3 (just got last one 3 days ago). I am worried that the Haze device chamber design/heater causes inadvertent combustion in that oils from the herbs go through the screens, and burn while clinging to the sides of the heating chamber or inside the machine itself. The vapour from the Aromed is much cooler due to water cooling but it definitely does not contain smoke from the residues left by normal daily use of the machine. In the Arizer, gravity makes very small particles of herb fall through the glass chamber’s screen and onto the heating element itself underneath, causing combustion and thus a mixture of smoke and vapour rather than pure vapour. You have to design the chamber so that you don’t have to clean it before using and get it back to original condition with no residue anywhere through the device. –How is the Haze v.3 designed to prevent overheating and the combustion that comes from it??? Can you test the product coming out of your machine to make 100% certain that it is vapour not mixed with any smoke? I am using the Haze device on 2 lights setting and still seem to be getting a smoke-vapour mixture which is very different from the Aromed but similar to the Arizer. If there is no way to design in overheating prevention, then combustion inevitably results as the machine overheats during regular use and clogs and starts to deliver smoke mixed with vapour. Vapour does not hurt the throat at all, smoke does and it makes you cough as well in ways that pure vapour does not. The herb is not burning inside the screen chamber of course and causing grey ash or combustion with a red glowing fire like a pipe would. But the combustion is more like a side effect of the oils and chemicals from the herbs being drawn on to the actual heating surfaces, which then smoke. The manner of heating (convection or conduction) is not as important as the manner of preventing the overheating and congestion inside the device that will lead to side effects like smoke mixed with vapour. Vapour should be clear and hard to see, what comes out of my Haze device is cloudy and opaque looking, not clear like the Aromed. WHich method or insert (can, convection, conduction) best prevents matter from sticking to the machine and causing smoke to mix with vapour?

    • Victor

      The vapor is composed of light reflecting particles so although feint, you should be able to see it, especially when you hit it with a light. But if you’re looking to reduce the density of your vapor, you can always reduce the heat by lowering the temperature. One of the reasons why I personally really like the Haze V3 is because of the fact that it’s capable of producing thick hits where a lot of other portables I’ve tried are not. Anyways, something else you can try is grinding your blend a little more course, assuming you were grinding it in the first place and not using an extract. Also, the can would probably be the safest bet for what you’re talking about but if you want to choose between a screen, the convection screen is what you’re looking for. It’s enclosed on all four sides so there’s less opportunity for the blend to stick to the side. The other screen, the conduction one, has two sides open, just for reference. And something else, when you say that vapor doesn’t hurt the throat at all – you must have never had a giant cloud. When you really get some serious vapor, you may very well feel it in your throat. For smokers, that’s part of the sensation and perhaps part of the reason why some vapers who are smokers or former smokers are looking for those giant hits that they can actually feel. But I think more importantly, if your blend is actually burning and you’re seeing combustion, which may be the case based on what you say, you should probably contact Haze’s customer support because you could be doing something wrong or you could have an actual problem with your vape that needs to be repaired or exchanged for a new one. Just my two cents. Good luck Tony!

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