🏠 Cooling & Heating Cost Estimator
1 Ton = 12,000 BTU cooling capacity
Higher SEER = lower operating cost
US average: 14¢/kWh. Check your utility bill.
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Daily Cost
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Monthly Cost
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Annual Cost
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kWh Per Day
💡 Savings Tip: Upgrading from SEER 13 to SEER 18 can reduce your cooling costs by approximately 28%.
📖 How This Calculator Works
This calculator estimates HVAC energy costs using industry-standard formulas:
- BTU to kW conversion: 1 Ton = 12,000 BTU ≈ 3.517 kW of cooling capacity
- Actual power draw: Unit Size (tons) × 12,000 BTU ÷ SEER Rating = Watts consumed per hour
- Daily cost: Watts ÷ 1,000 × Hours per day × Electricity rate (¢/kWh) ÷ 100
- Annual cost: Daily cost × 30 days × Cooling months
Actual costs may vary based on insulation, outdoor temperature, thermostat settings, duct efficiency, and local utility rates.
🔍 Factors That Affect HVAC Costs
- SEER Rating: Seasonal Energy Efficiency Ratio. Higher SEER = lower bills. Modern units range from SEER 13 to SEER 26.
- Electricity Rates: Vary by state from ~8¢/kWh (Louisiana) to ~35¢/kWh (Hawaii). The US average is ~14¢/kWh.
- Usage Patterns: Thermostat setbacks of 7–10°F for 8 hours can save 10% annually.
- Maintenance: Dirty filters increase energy use by 5–15%. Clean or replace filters monthly during peak season.
- Duct Leakage: Leaky ducts can waste 20–30% of conditioned air. Sealing ducts improves efficiency dramatically.
⚠️ Disclaimer: This calculator provides estimates only. Actual costs depend on many factors including local climate, insulation levels, thermostat settings, ductwork condition, and utility rate structures. For a professional energy audit, consult a licensed HVAC technician or energy auditor.