What was the previous system?markopas wrote: ↑ Please don't think a tankless water system is an upgrade - I've had one since I moved in to my house and probably one of the first in Canada under new builds. Yes that system was a piece a junk and units have come a long way since then but I still think that going with a conventional tank system is a better option or at least rent a tankless because of the maintenance required to keep these things running.
If you want to invest in a really good tankless there are only two good ones on the market (Rinnai and Navien), we replaced our failing unit after 6yrs to a Navien. I think if you want to go tankless you need to go with a two unit tankless system and have them side by side in order for it to act like a conventional water heater.
If you want to use a tankless system like the europeans then you need to usually have a small unit at every tap which guarantees you hot water at tap rather than running the hot water tap for 10-15sec. The closer your tap is to the system the quicker it will cycle to hot water.
Also I have a small house, so piping is not that far away from the basement, so don't think there will be more than couple of secs different between conv and tankless.