1. What is Building Regulations Part G?

Building Regulations Part G covers sanitation, hot water safety, and water efficiency requirements for new buildings and major renovations in the UK. It ensures proper water usage and safety standards are met.

2. How Does the Calculator Work?

The calculator uses the Part G water calculation formula:

Where:

• \( Fixture\ Consumption \) — Total water consumption from all fixtures (l/person/day)
• \( 5 \) — Additional water allowance per regulations (l/person/day)

Explanation: The equation calculates the total water consumption per person per day by summing all fixture consumption and adding the mandatory 5 l/person/day allowance as specified in Part G regulations.

3. Importance of Water Calculation

Details: Accurate water consumption calculation is crucial for compliance with building regulations, ensuring adequate water supply, promoting water efficiency, and meeting environmental sustainability standards.

4. Using the Calculator

Tips: Enter the total fixture consumption in liters per person per day. The value must be a valid non-negative number. The calculator will automatically add the 5 l/person/day regulatory allowance.

5. Frequently Asked Questions (FAQ)

Q1: What fixtures are included in the consumption calculation?
A: All water-consuming fixtures including toilets, showers, baths, taps, and appliances like washing machines and dishwashers.

Q2: Why is there a +5 l/person/day allowance?
A: This is a regulatory requirement under Part G to account for additional water usage and ensure adequate supply for all household needs.

Q3: What are typical fixture consumption values?
A: Typical values range from 120-150 l/person/day for standard fixtures, but can vary based on fixture efficiency and usage patterns.

Q4: Are there maximum limits under Part G?
A: Yes, Part G sets maximum water consumption limits for new dwellings, typically around 125 l/person/day including the +5 allowance.

Q5: When is this calculation required?
A: This calculation is required for all new building projects and major renovations to demonstrate compliance with Part G water efficiency requirements.