Has anyone got two instantaneous gas water heaters linked together?
I know this can be done with a few types, e.g.Rheem & Dux so that the two 26 ltr/min units combine to give up to 52 ltr/min if demand requires the second unit to kick in to keep flow constant.
Possibly looking at this option as usage from three bathrooms with teenagers could mean higher demand at times than a single unit can manage.
Any information or other suggestions appreciated.