Engineering Tools
EER / COP / SEER Converter
Enter any AC energy efficiency value to instantly convert between EER, COP, SEER, and CSPF, with automatic Taiwan energy rating classification. Suitable for AC selection, energy assessment, and engineering design.
AC Energy Efficiency Converter
Conversion Results
Conversion Formula
This tool uses EER as the base unit for conversion. The core conversion relationships are:
EER = COP × 3.412
COP = EER / 3.412
SEER ≈ EER × 1.12 (simplified approximation)
CSPF ≈ SEER × 0.2931 (kW/kW)
EER (Energy Efficiency Ratio) is the efficiency metric for fixed-speed AC units under rated conditions; COP (Coefficient of Performance) is the internationally used performance coefficient; SEER (Seasonal Energy Efficiency Ratio) accounts for seasonal efficiency under varying temperature conditions; CSPF (Cooling Seasonal Performance Factor) is the metric used in Taiwan energy standards for inverter AC units.
Taiwan energy ratings are divided into 5 levels based on CSPF: Level 1 (CSPF ≥ 6.0) is the most energy efficient, Level 5 (CSPF < 4.2) is the least efficient. This tool uses simplified formulas for estimation; actual energy ratings are subject to official announcements by Taiwan's Bureau of Energy.
Frequently Asked Questions
What is the difference between EER and COP?
EER (Energy Efficiency Ratio) is measured in BTU/W*h, while COP (Coefficient of Performance) is measured in W/W. EER = COP x 3.412. COP is the internationally used metric, while EER is more common in American systems.
What is CSPF?
CSPF (Cooling Seasonal Performance Factor) is the energy efficiency metric used in Taiwan standards. It considers the full-year operating performance of inverter air conditioners under varying loads, and better reflects actual energy savings compared to fixed-speed EER.
How do you determine an AC energy efficiency rating?
In Taiwan, energy efficiency is rated on a scale of 1-5 based on CSPF values: Level 1 (CSPF >= 6.0) is the most energy efficient, Level 5 (CSPF < 4.2) is the least efficient. When purchasing, it is recommended to choose Level 1-2 rated products.
Professional Consultation
Need Professional HVAC Engineering?
Online tools provide preliminary estimates for reference. Actual engineering design requires consideration of many additional professional factors. Contact our engineering team for precise HVAC system planning.