Just saw a news release in "Family Handyman" magazine that AO Smith has a new tank water heater called the "Vertex." Has a helical coil heat exchanger, is 90% efficient, has hot and cold recirc. taps, and apparently can deliver 3 gpm continuously, like a tankless unit.
What's the catch? Retail price = $2240.
Just wondered if any of the pros have seen or installed one yet, as an alternative to a tankless unit.