Purchased a house with a tankless water heater installed by this guy. Turns out they had installed the pressure relief valve so that it drains into the attic. Brilliant! When I contacted them about paying for the fix, Ray, the apparent owner was about as unprofessional as it gets. The fix ended up not being too terribly expensive. Wanted to sue because he was such an a-hole about it, but decided it wasn’t worth the hassle. Would never do business with him and would not recommend anyone do so either.