Hi - we have a Rinnai Tankless, RUR98i, installed as part of a new build. It has the recirculation feature, which we have been told should give us instant hot water and avoid a cold water sandwich.
Since we've moved in, we've experienced the following - When the recirc is on, we do get (nearly) instant hot water throughout the house. However, after 30-60 seconds, the water will get increasingly cooler for another 60 seconds. Then it will heat back up again to full heat.
We've been told that this cold water sandwich shouldn't happen with the recirculation on. The plumber, working under warranty, has been largely unhelpful. Any suggestions or similar experiences with this heater? Are our expectations correct?
Since we've moved in, we've experienced the following - When the recirc is on, we do get (nearly) instant hot water throughout the house. However, after 30-60 seconds, the water will get increasingly cooler for another 60 seconds. Then it will heat back up again to full heat.
We've been told that this cold water sandwich shouldn't happen with the recirculation on. The plumber, working under warranty, has been largely unhelpful. Any suggestions or similar experiences with this heater? Are our expectations correct?