available hot water.
With a storage water heater, this additional demand can use up hot water more quickly. With a tankless water heater, simultaneous demand may approach the unit’s heating or flow capacity.
You might notice the shower becoming cooler, particularly during a long wash cycle or when several people are using hot water.Modern thermostatic and pressure-balancing shower valves can help limit temperature fluctuations, but their effectiveness depends on the plumbing system and the condition of the valve.
What you can do: If your shower regularly turns cold when
