1. What is EER Rating?

The Energy Efficiency Ratio (EER) is a measure of how efficiently a cooling system operates when the outdoor temperature is at a specific level (usually 95°F). It's calculated by dividing the cooling capacity (in BTU/h) by the power input (in watts).

2. How Does the Calculator Work?

The calculator uses the EER formula:

Where:

• \( BTU/h \) — British Thermal Units per hour (cooling capacity)
• \( Watts \) — Electrical power consumption

Explanation: Higher EER values indicate more efficient air conditioners. The ratio shows how many BTUs of cooling you get for each watt of energy consumed.

3. Importance of EER Calculation

Details: EER helps consumers compare the energy efficiency of different air conditioning units. Higher EER units typically cost more but save money on energy bills over time.

4. Using the Calculator

Tips: Enter cooling capacity in BTU/h and power input in watts. Both values must be greater than zero. The calculator will compute the EER ratio.

5. Frequently Asked Questions (FAQ)

Q1: What is a good EER rating?
A: Generally, EER ratings of 10 or higher are considered good for residential air conditioners.

Q2: How does EER differ from SEER?
A: EER measures efficiency at one outdoor temperature (95°F), while SEER (Seasonal EER) measures efficiency over an entire cooling season.

Q3: Where can I find my AC's BTU and wattage?
A: Check the unit's specification plate, owner's manual, or manufacturer's website for these values.

Q4: Does higher EER always mean better?
A: While higher EER means better efficiency, consider climate, usage patterns, and initial cost when choosing a unit.

Q5: How much can I save with a higher EER unit?
A: Savings depend on usage and local electricity rates, but a unit with EER 12 vs EER 10 can save about 17% on cooling costs.