1. What is a Water Heater Size Calculator in Liters?

Definition: This calculator estimates the required water heater size based on peak hot water demand and a safety factor.

Purpose: It helps homeowners and plumbers determine the appropriate water heater capacity for residential or commercial applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Size} \) — Required water heater capacity (liters)
• \( \text{Peak Demand} \) — Maximum hourly hot water demand (liters/hour)
• \( \text{Factor} \) — Safety factor (typically 1.5 for residential)

Explanation: The peak demand is multiplied by a factor to ensure adequate hot water supply during periods of high usage.

3. Importance of Proper Water Heater Sizing

Details: Correct sizing ensures sufficient hot water supply, energy efficiency, and prevents premature equipment failure.

4. Using the Calculator

Tips: Enter your peak hot water demand in liters per hour and the safety factor (default 1.5). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine my peak demand?
A: Add up the flow rates of all fixtures that might run simultaneously during peak usage times.

Q2: Why is the factor typically 1.5?
A: This accounts for recovery time, unexpected usage spikes, and maintains system efficiency.

Q3: When would I use a different factor?
A: Use higher factors (1.8-2.0) for commercial applications or large families with high simultaneous demand.

Q4: Does this work for tankless water heaters?
A: No, tankless systems are rated by flow rate (L/min) rather than storage capacity.

Q5: How does insulation affect sizing?
A: Well-insulated tanks may allow for slightly smaller sizes due to reduced standby heat loss.