[bcrdukes]

Update: Getting a Rinnai Ru199iN, the same exact unit as Hakkaboy's.

I got quotes from 6 different vendors for a high output hot water tank, and the cost/difference was negligible compared to the tankless system ($200) and only one-year's warranty on parts/labour, versus the Rinnai, at 15 years for the heat exchanger etc. Losing the hot water tank frees up more space for a new hydronic air handler as well, so it all evened out. If my town house had a more simple set up, I would have stuck with a regular hot water tank for the cost savings. But because of the complicated high velocity, high output system, it made sense (for me) to go with a tankless system. I hope none of you ever end up in a home with a high velocity hydronic HVAC system.