Can I have more than one instantaneous unit installed? Comments Off on Can I have more than one instantaneous unit installed? 18 Jan 2016 Vote Up 0 Vote Down Answered Public Public Private Gas Water Heating Anonymous asked January 18, 2016 Hi, Can I have more than one instantaneous unit installed? 1 answer Vote Up 0 Vote Down Public ⋅ January 20, 2016 Yes, of course you can. #1 Please login or Register to Submit Answer