Thermal Vent beam with Efficient is not a good idea. Less heat this beam generates less efficient it is in cooling your ship.Here's one at 12-14... I didn't fully finish building it yet though...
https://edsy.org/#/L=IG00000H4C0S20...qG05I_W022K004jw2012GG05I_W00nG30,Dead_0Titan
Yes, almost all my thermal vents are long range, but before I learned not to combine the 2, I had already built 3 that was just sitting around, So when I did a cold Clipper (for Titan pod extractions) build, it was under powered and I tried one of those efficient thermal vents and it worked because I wasn't thrusting much, just hiding from interceptors. I didn't complete this Cobra build yet and the early version was using a shield and couldn't handle the weapons, but since it worked for the clipper I figured I would try it again as a workplace tool. But without the Shield and having the extra power, I absolutely should have updated it to long range. ThanxFrom a quick test of shieldless build - about the same. Can't say I've noticed any differences, but it was a couple of months since I had DBS.
Thermal Vent beam with Efficient is not a good idea. Less heat this beam generates less efficient it is in cooling your ship.