1. What is a Rheem 9.5 GPM Tankless Gas Water Heater?

Definition: This calculator determines if a Rheem 9.5 GPM tankless gas water heater can meet your household's hot water demands.

Purpose: It helps homeowners and plumbers size tankless water heaters by calculating total simultaneous hot water needs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Total flow rate (gallons per minute)
• \( Q_i \) — Flow rate of each fixture

Explanation: The calculator sums the flow rates of all potentially running fixtures to determine peak demand.

3. Importance of Proper Sizing

Details: Correctly sizing a tankless water heater ensures adequate hot water supply without overspending on an unnecessarily large unit.

4. Using the Calculator

Tips: Enter the number of each fixture that might run simultaneously. The calculator uses standard flow rates:

• Shower: 2.5 GPM
• Sink: 1.5 GPM
• Dishwasher: 1.5 GPM
• Washing Machine: 2.0 GPM
• Bathtub: 4.0 GPM

5. Frequently Asked Questions (FAQ)

Q1: What does 9.5 GPM mean?
A: The heater can provide 9.5 gallons of hot water per minute with a typical temperature rise.

Q2: When would I need more than 9.5 GPM?
A: For large homes with multiple bathrooms running simultaneously or high-flow fixtures.

Q3: Can I use lower flow fixtures to reduce requirements?
A: Yes, low-flow showerheads (1.5-2.0 GPM) and faucets can significantly reduce total demand.

Q4: What about temperature rise?
A: This calculator assumes standard temperature rise. Colder climates may require higher capacity.

Q5: Is Rheem 9.5 GPM suitable for whole-house use?
A: Yes, for most 2-3 bathroom homes, unless multiple high-flow fixtures run simultaneously.