1. What is Water Efficiency Calculation?

Water efficiency calculation for new builds estimates total water consumption per person per day by summing fixture consumption and adding a standard 5 l/person/day allowance.

2. How Does the Calculator Work?

The calculator uses the water efficiency formula:

Where:

• \( fixture\_consumption \) — Water consumption from fixtures (l/person/day)
• \( 5 \) — Standard additional allowance (l/person/day)

Explanation: This formula calculates the total water consumption by adding fixture consumption to a standard 5 l/person/day allowance for new building water efficiency assessments.

3. Importance of Water Efficiency

Details: Water efficiency calculations are crucial for sustainable building design, regulatory compliance, and reducing environmental impact of new constructions.

4. Using the Calculator

Tips: Enter the total fixture water consumption in liters per person per day. The value must be a non-negative number.

5. Frequently Asked Questions (FAQ)

Q1: What is included in fixture consumption?
A: Fixture consumption includes water usage from toilets, showers, faucets, and other water-using fixtures in the building.

Q2: Why is there a +5 l/person/day allowance?
A: This accounts for miscellaneous water uses not covered by standard fixtures and provides a buffer for calculation purposes.

Q3: What are typical values for fixture consumption?
A: Typical values range from 80-120 l/person/day depending on fixture efficiency and building type.

Q4: Are there regulatory standards for water efficiency?
A: Yes, many regions have building codes and sustainability certifications that set maximum water consumption limits for new constructions.

Q5: How can water efficiency be improved in new builds?
A: Through water-efficient fixtures, rainwater harvesting, greywater recycling, and smart water management systems.