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Energy Use Intensity Formula:
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Energy Use Intensity (EUI) is a measure of a building's energy consumption relative to its size. It's calculated as energy consumed per unit area per year, typically expressed in kWh/m². EUI allows for comparison of energy performance across different buildings regardless of their size.
The calculator uses the EUI formula:
Where:
Explanation: The equation divides the total energy consumption by the total floor area to determine energy efficiency per square meter.
Details: EUI is a critical metric for assessing building energy efficiency, setting energy performance benchmarks, and identifying opportunities for energy savings in residential, commercial, and industrial buildings.
Tips: Enter total energy consumption in kWh and total floor area in square meters. Both values must be positive numbers greater than zero.
Q1: What is a good EUI value?
A: EUI benchmarks vary by building type and climate. Lower EUI values generally indicate better energy efficiency. Commercial buildings typically range from 100-400 kWh/m²/year.
Q2: How does EUI differ from energy consumption?
A: While energy consumption measures total energy use, EUI normalizes this value by building area, allowing for fair comparison between buildings of different sizes.
Q3: What time period should EUI cover?
A: EUI is typically calculated annually to account for seasonal variations in energy use and provide a comprehensive view of building performance.
Q4: Can EUI be used for all building types?
A: Yes, but interpretation should consider building type, occupancy patterns, and climate. Different building types have different EUI benchmarks.
Q5: How can I improve my building's EUI?
A: Energy efficiency measures like insulation upgrades, high-efficiency HVAC systems, LED lighting, and smart controls can significantly reduce EUI.