Occasionally, we run across an inside non-condensing tankless water heater that started leaking causing damage below due to NO water heater pan.  When we point this out to the customer, we always get the same reply.  We were told we DID NOT need a water pan!  Foolish!  Remember to protect yourself and your property.  Regardless of tank type water heater, condensing tankless water heater and non-condensing tankless water heater ALWAYS install a water heater pan!  #americanplumbingla.com, @americanplumbingla.com, #leakdetection, #videopipeinspection, #tanklesswaterheaterpan