Look at the next few seconds of this video, demonstrating the phlogistinator in action:
As you can see, the effective range of this flame thrower extends surprisingly much further than the graphical effect does, and this is pretty much a fact. On the other hand, the range is so surprisingly longer, it begs the question — is the Phlogistinator's range actually longer than the other flamethrowers'?
Some YouTube comments seem to agree, but we know that doesn't mean very much. On the other hand, the relevant wiki article mentions nothing about this.