Update - the plumber lied - ask the building inspector about the no tank heater indoors - he said - no that's not true. Plumber slithered out quickly and have not heard anything from him since??? Does this mean it's free?? Talk about scammers - They best not ask for payment after the nightmare and bs - they did get a down payment but still - now I am questioning the quality of the unit installed and will highly not recommend that business.