Over this past weekend we underwent a big project for our house. We replaced our old 40 gallon hot water tank for a 50 gallon power vent hot water tank. I will give you a moment to lower your hype. I know! haha. This was a very exciting project for us, more so Darrel, because this meant we could remove the massive B-vent running through the middle of our house. Getting us one step closer to our open floor plan dreams. What I have been told this difference between the two systems is the original b-vent relies on evaporations/draft to vent out fumes from the hot water tank. And normally they just get reabsorbed into the tank. The power vent has a fan like system that pumps the fumes outside of the house actively, instead of them floating up and outside. I don't think one is better than an other, just a different way of doing it. The nice thing about this new tank is even though it is larger, it uses less BTU's than our previous tank meaning it is more energy...