If this flue worked, it would be a miracle! This classic picture makes anyone that sees it wonder how the occupants of this California home survived. A flexible flue was crimped and shoved into an existing flue in a manner appearing to be the work of an evil technician hired to silence the unsuspecting homeowner…

We estimate delivered efficiency on this water heater at 98%, as virtually no flue gases will likely make it out of the tank. Of course that only lasts for a few minutes before CO to reach levels that could kill a horse in 5 minutes.

Notice the “We’re here to help” sticker installed on the water heater below. (By the local utility?) All we can say is, Wow!