This Navien NPE240 is providing all the domesti c hot water for a restaurant in Newtown, CT.
Flush Your Navien-
Like all high-efficiency water heater, boilers, & combi units your Navien requires maintenance to keep the heat exchanger free from build-up. A clean heat exchanger allows the unit to run as efficiently as possible and trouble free operation. Not flushing out a high-efficiency tankless water heater will lead to premature part failure and lower efficiency. Homes with black iron pipes- cast iron radiators must be especially diligent.