BEWARE: Advice is to NOT use them. I bought a tankless hot water heater from them and in less than a year (under warranty), it broke. Speaking with them about this they were rude & very short. They suggested to send the THWH in (at customer expense) so they can determine what happened and couldn't care less about the who knows how long it would take to fix & send back. Meanwhile, having no hot water. I bought a Rheem THWH and when I hired a plumber to install, he said, "you are lucky because your house could have burned down!" THE ENTIRE RIGHT SIDE OF THE INTERNAL WAS MELTED & WIRING, ETC. They won't give a refund (AGAIN- STILL UNDER WARRANTY) and who wants their product in their home after all this!