Beautiful, Philadelphia, the City of Brotherly Love!
All that work for $5!
I had a customer who made his gas fired water heater 100% efficient.
He came up with this idea of a soup can with four can opener cuts in the top, this was installed in place of the draft hood.
He told me he came upon the flaw in the engineering of the original tank based on how hot the flue pipe was. He reckoned that heat was going up the chimney as waste heat. Now all this waste heat was being captured in his basement, and acting as radiant floor heating.
Great idea except the flame rolled out of the front melting the knob off the thermostat, and catching the insulation jacket on fire.
I restored the flue connection, and took a picture for proof. This dope engineer told me he was going to install a sheet diverter around the base of the new tank to lessen the chances of the flame melting the knobs off.
I could not convince him to leave the tank alone, I also could not convince him to allow the install of a higher efficiency tank.