![residential condensing tankless](/ext/resources/PM/2014/September/products/PM0914_Products_tankless-wh_Rheem-Prestige_300.jpg)
The unit comes installed with intelligent electronic controls and a self-diagnosis system. Employing a minimum flow rate of 0.26 gal. per min. and a minimum activation flow rate of 0.40 gpm, homeowners using low-flow fixtures receive hot water without having to increase the flow. Units are available in outdoor and indoor models, the latter of which can vent with PVC piping.