Absolutely YES. There are several ways to accomplish recirculation. Some homes have a ‘Third Line” recirculation system where a water line has been routed from the water heater to the farthest faucet, and back to the water heater. This type of system uses a pump that keeps hot water circulating around this “loop”. When any faucet in the home is opened, the hot water is instantly there. On a tankless recirculation system, the water doesn’t really “re-circulate” back to the heater constantly, rather it works to keep hot water in the lines, and shuts off the water heater when that has been accomplished. Hot water does not re-circulate back through the tankless water heater. Another method of recirculation is to use a special pump that installs under the sink at the farthest faucet and it works to keep hot water there. All tankless recirculation systems use timers and thermostats to control the time and duration of operation. This affords you the best of both worlds: Convenience and Conservation.