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  • Re: Navien Tankless Heaters

    I have read many bad things about tankless water heaters and Navien in particular on the internet. I have a Navien Combi (NG) unit running for the first winter - no serious problems as yet, although the programming seems a bit erratic. I am heating a 750 sq ft addition with radiant floor heating and DHW. If and when I do decide to go back to a tank unit I would have to put in a boiler as well - correct? What kind of NG boiler would you professionals recommend? Would it be feasible to use Combi unit for heating only and install NG tank unit?