Having installed tankless for decades my experience says use this for one fixture at a time and do your homework before purchasing any tankless. If you do not feel you can service this, do not purchase it. In hard water after a few years of no service, it must be rebuilt and is not worth the expense. Few plumbers take the time to learn tankless technology and far fewer take the time to learn to service these. Still fewer will work on Bosch. I no longer service Bosch. IN the greater San Francisco Bay area there are approx 3 million people, there were two authorized service personnel, now there is one south of San Francisco.
   Bosch until recently did not have a labor warranty and if there were problems, you were on your own.  Manuals are very basic, almost generic and contain no electrical values which makes most service techs very dependent on Vermont which is real difficult if you live in the west and they leave the shop at 2PM PST. Bosch clearly recommends having a qualified installer and I yet have to see a correct installation by a homeowner and all homeowner installations I have seen have voided the warranty.
  Their new labor coverage policy is a move forward but far from perfect. Several other brands have a hands down exceptional warranty labor coverage. Shop and compare.

Recommended: No