Estimate how long your water heater takes to fully recover after heavy use based on tank size, element rating, and incoming water temperature.
Tank Details
A typical shower uses 10-20 gallons. A bath uses 30-40 gallons.
Check the label on your water heater. Most electric units are 3500-5500W. Gas units are 30,000-50,000 BTU/hr.
Water Temperature
120F is the recommended setting for most households. 140F is recommended if someone in the home is immunocompromised.