A homeowner is planning to install a new water heater in a small bathroom. The bathroom has a shower, a sink, and a toilet. What is the minimum water heater capacity required?
- 30 gallons
- B40 gallons
- C50 gallons
- D60 gallons
Exam tip
Always consider the water usage of all fixtures in the bathroom when selecting a water heater capacity.
Why A is correct
According to Section R312.1.1 of the 2024 IRC, a water heater with a capacity of at least 30 gallons is required for a bathroom with a shower, a sink, and a toilet. This ensures sufficient hot water supply.