Please I beg you do not buy Bosch tankless water heaters. It has never worked properly from the beginning.
Currently it will for no reason produce steam from the hot water side. That's 250 degree water without warning this product is unsafe and Bosch just gives me the run around. Total cost after install was around $1500.00 money that is lost and nonrefundable. After the first week the EA error code would show up for no reason.
You had to go and reset the error to use the hot water only to have it do the same thing a week or 2 later. My review Junk Junk Junk!
Monetary Loss: $1100.