1. What is Energy Use Intensity (EUI)?

Energy Use Intensity (EUI) is a measure of a building's energy efficiency, calculated as energy consumption per unit area. It's typically expressed in kWh/m²/year and is used to compare energy performance across different buildings.

2. How Does the Calculator Work?

The calculator uses the EUI formula:

Where:

• \( Total\ Energy \) — Total energy consumption (kWh)
• \( Area \) — Total floor area (m²)

Explanation: The equation calculates how much energy is used per square meter of space, providing a standardized metric for energy efficiency comparison.

3. Importance of EUI Calculation

Details: EUI is crucial for benchmarking building energy performance, identifying energy-saving opportunities, and meeting sustainability goals. Lower EUI values indicate better energy efficiency.

4. Using the Calculator

Tips: Enter total energy consumption in kWh and total area in square meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is a good EUI value?
A: EUI values vary by building type, climate, and usage. Generally, lower values are better. Commercial buildings typically range from 100-400 kWh/m²/year.

Q2: How can I improve my building's EUI?
A: Energy efficiency measures like LED lighting, HVAC optimization, better insulation, and renewable energy integration can reduce EUI.

Q3: Does EUI account for different energy sources?
A: EUI typically measures site energy consumption. For source energy calculations, conversion factors are applied based on energy source.

Q4: How often should EUI be calculated?
A: EUI should be calculated annually to track performance trends, but can be calculated more frequently for energy management purposes.

Q5: Can EUI be used for all building types?
A: Yes, but benchmarking should compare similar building types as energy use patterns vary significantly between residential, commercial, and industrial buildings.