Originally Posted by 2BeerSpeer
I aquired a single tier from a guy and it doesn't have these, actually alot of the threads I've looked at don't, and I was wondering how critical they are? I'm making mine automated soon and will be changing the gas plumbing to match yours...Love the 2" framing, unfortunately mine is 1 1/4 - 1 1/2 ish..
May need some gas line from OHG..
Depending on how your heat shields are designed, especially if they encircle completely around the burners and the exhaust gases have no where to go. The burners need to breathe and it can be trial and error sometimes with each stand and kettle/keggle configurations being different. You can see the difference if you get the blue flames with yellow tips without the keggle on the stand and then when you put the keggle in place the flames change color, or the flame size varies, or the flames go up the sides of the keggle.
You can then raise the keggle 1/2 inch or higher (again trial and error) and see if this corrects the problem. One guy on here uses bolts between the keggle and the stand to raise the keggles off the stand so the exhaust gases can disipate, and oxygen can mix and enter for proper combustion. Then the proper flame size and color can be achieved.
Once fine tuned this will give you better gas efficiency and you will be able to fine tune the gas/flame/heat relationship and achieve the most practical and useable btu's out of your burners, for your particular set up. So if you can't get the proper results with the keggle sitting on the stand try raising it up off the stand and see if this solves the problem. If this does it then you may want to permanently attach stand offs on you rig. But again each set up is different and some need stand offs and some rigs don't. Trial and error makes up a lot of what we do on these brew rigs to make them better!
Hope this helps a little,