Rinnai RL75 - need hot water faster
I have bought a house recently which has a tankless water heater made by Rinnai that doesn't have a manual and I never seen or run one before. It is an indoor Rinnai RL75i.
My two-story house has three bathrooms and the hot water we are getting from the water heater at the most distant shower is OK but it takes time to get it.
My question is: how can I get it faster... do I have to buy a special pump? Any suggestion would be appreciated.