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Energy Use Intensity Formula:
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Energy Use Intensity (EUI) is a key performance indicator that measures a building's energy efficiency. It represents the amount of energy consumed per unit area, typically expressed in kilowatt-hours per square meter (kWh/m²) for electricity.
The calculator uses the EUI formula:
Where:
Explanation: The equation calculates energy efficiency by dividing total electricity consumption by the total floor area of the building or space.
Details: EUI is crucial for benchmarking building energy performance, identifying energy efficiency opportunities, tracking conservation progress, and complying with energy regulations and standards.
Tips: Enter total electricity 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: Lower EUI values indicate better energy efficiency. Benchmark values vary by building type, climate zone, and usage patterns.
Q2: How often should EUI be calculated?
A: EUI should be calculated regularly (monthly, quarterly, or annually) to track energy performance trends and measure the effectiveness of energy conservation measures.
Q3: Can EUI be used for different energy sources?
A: While this calculator focuses on electricity, EUI can be calculated for other energy sources by converting them to a common unit (kWh or kBtu) before calculation.
Q4: What factors affect EUI?
A: Building age, insulation quality, HVAC efficiency, occupancy patterns, equipment efficiency, and operational hours all significantly impact EUI values.
Q5: How can I improve my building's EUI?
A: Energy efficiency measures such as LED lighting upgrades, HVAC optimization, improved insulation, smart controls, and behavioral changes can help reduce EUI.