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I am buying a new tankless water heater for the first time. I have extremely hard water and I have a water softener. Will the softener help or hurt the tankless unit? and should I run an additional inline water filter before the tank as an extra precaution? If so any recommendations on which...

I am looking at the Rinnai Tankless gas model RU199in. I cannot tell if it comes with a recirculating pump or not. Does anyone know? Also what exactly does this pump do? This is the Rinnai model that I am looking at. Also I have ICF walls in my basement (foam filled with cement). Could this...

I want to install a natural gas tankless water heater, converting from a standard tank type. My house is 2 story 3200 square feet with 2 occupants. My ground water temp is 42F. I live in a cold climate in North West Montana, I am anxious to get the right system, any recommendations or...