Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Anybody tried the shell and tube exchangers that are sold by Central Boiler? They show a vertical install on the side of a standard water heater that utilizes a gravity flow on the potable side of the exchanger. I was wondering how well this works from someone with experience with this setup.