I think it's kind of interesting how a larger sized pipe doesn’t necessarily equal more cooling. I’ve had physically larger pieces that weren’t as efficient as some smaller stuff, there’s a lot of dynamics going on that seem to affect this. Water level is a big one, like a straight tube will hold less water than the equivalent beaker bottom, or round bottom, which will have a pronounced effect on the cooling. My last two bubbler purchases seemed like they delivered more cooling than my taller 14" double perc straight tube.
Realistically though, vapor "cooling" is largely mythology. If you can see the vapor it has already begun condensing. The challenge with bigger tubes (especially) is finding the balance between "cooling" proportional to losses from condensation.
I'm actually looking to get away from the heating coil and go towards another direction so long as it is not cost prohibitive. It is challenging trying to build McLaren's on a beer can budget
Lately im in contact with a more local scientific glassblowing shop in hopes of finding the right manufacturer whom can help me turn some ideas into fresh functioning prototypes. I've been sketching out a bunch of custom glass vapor rigs lately; some dry, some wet.
You could win the World Series with that Slugger!
"The smile on your face lets me know that the dab worked"