Annual Operating Cost Calculator
Compare your old AC's annual costs against a modern, energy-efficient system. Find out exactly how much you can save!
Annual AC Operating Cost Calculator
Compare the annual costs of your old and new AC system
Old system
New system
Old system
New system
Annual savings
71,627 HUF
How We Calculate
Annual operating cost consists of two main components: cooling season costs (typically May-September) and heating season costs (October-March). Both are calculated using the unit's efficiency ratings.
Cooling Cost Formula
Cooling cost depends on the AC's rated capacity, daily usage, season length, and SEER rating. SEER (Seasonal Energy Efficiency Ratio) measures average cooling efficiency over an entire season.
Example: 3.5 kW × 8 h × 4 mo × 30 days × €0.20 ÷ 7.0 SEER = €96/season
Heating Cost Formula
Heating cost uses the same formula but with SCOP (Seasonal Coefficient of Performance) instead of SEER. Heating typically runs at lower efficiency than cooling.
Example: 3.5 kW × 8 h × 4 mo × 30 days × €0.20 ÷ 4.0 SCOP = €168/season
Note: Actual consumption typically varies 10-20% from calculated values. Inverter AC units run at partial load most of the time, so real consumption is often better than rated values. The calculator uses an average load profile.
Energy Class Comparison
| Energy Class | SEER | SCOP | Savings vs. A |
|---|---|---|---|
| A | 5.1 - 5.6 | 3.4 - 3.6 | -- |
| A+ | 5.6 - 6.1 | 3.6 - 4.0 | ~10% |
| A++ | 6.1 - 8.5 | 4.0 - 4.6 | ~25% |
| A+++ | 8.5+ | 4.6+ | ~40-50% |
Tips to Reduce Costs
Use Shading
Blinds, shutters, or exterior shading can reduce cooling load by 20-30%, meaning your AC uses significantly less energy.
Timers & Smart Control
Avoid cooling or heating an empty home. Use timers or WiFi-enabled smart controls to have the temperature ready when you arrive.
Regular Maintenance
Service your AC at least once a year. Clogged filters and dirty heat exchangers increase energy consumption by 15-25%.
Optimal Temperature
Set 24-26 °C in summer and 20-22 °C in winter. Each degree of difference changes consumption by approximately 5%.
Improve Insulation
Sealing windows and doors, adding wall and roof insulation can reduce heating and cooling demand by up to 40%.
Choose the Right Mode
Use "Auto" mode for the most efficient operation. "Turbo" mode cools faster but consumes significantly more energy.
When to Buy a New AC
If your old AC breaks down frequently or repair costs approach the price of a new unit, it may be time to upgrade. This comparison helps you decide.
| Factor | Repair | Buy New |
|---|---|---|
| Unit Age | Less than 5 years | Over 10 years |
| Repair Cost | Under 30% of new price | Over 40% of new price |
| Energy Class | A+ or better | B or worse |
| Refrigerant | R32 (modern) | R22/R410A (phasing out) |
| Breakdown Frequency | First time | Recurring annually |
| Annual Excess Operating Cost | Not significant | €150+/year |
Rule of thumb: if your AC is over 10 years old and the repair would cost 40% of a new unit, replacing it is the better investment.
Real Consumption Examples
Three typical scenarios with estimated annual operating costs, calculated at €0.20/kWh.
25 m² -- 2.5 kW
- Daily use:6 hours
- Cooling season:4 months
- Heating season:3 months
- SEER / SCOP:6.5 / 4.2
Estimated annual cost
~€205
Cooling: ~€110 + Heating: ~€95
40 m² -- 3.5 kW
- Daily use:8 hours
- Cooling season:4 months
- Heating season:4 months
- SEER / SCOP:7.0 / 4.0
Estimated annual cost
~€403
Cooling: ~€192 + Heating: ~€211
80 m² -- 7.0 kW
- Daily use:10 hours
- Cooling season:5 months
- Heating season:5 months
- SEER / SCOP:6.1 / 3.8
Estimated annual cost
~€1,080
Cooling: ~€492 + Heating: ~€588
These figures are estimates calculated at €0.20/kWh. Actual consumption depends on insulation quality, climate conditions, and usage patterns.
Frequently Asked Questions
How do I calculate the annual operating cost of an AC unit? ▼
The annual cost depends on AC capacity (kW), daily usage hours, cooling/heating months, electricity price, and system efficiency (SEER/SCOP). Formula: Cost = Capacity × Hours/day × Months × 30 days × Price/kWh ÷ SEER (or SCOP for heating).
How much can I save by upgrading to a modern AC system? ▼
Upgrading from an old system (SEER 3.5) to a modern A+++ unit (SEER 8.5) can reduce energy costs by 40-60%. For a typical 3.5 kW system, this means annual savings of €200-400, paying for the new system in 3-5 years.
What do energy efficiency classes (A to A+++) mean for AC units? ▼
Energy classes indicate cooling/heating efficiency. A: SEER 5.1-5.6, A+: SEER 5.6-6.1, A++: SEER 6.1-8.5, A+++: SEER 8.5+. Higher classes consume significantly less electricity for the same cooling/heating output.
Is it cost-effective to use an AC for heating? ▼
Yes, modern inverter ACs with SCOP 4.0-5.0 are extremely efficient heaters — producing 4-5 kWh of heat per 1 kWh of electricity. This is much cheaper than gas or electric radiators in mild winters (above 0°C), and most units work effectively down to -15°C.
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