Free tools · Homes
AC efficiency savings calculator
Is a new AC worth it? Compare your old unit with a more efficient one. Add a warmer thermostat if you like. See the kWh and QAR you save each year, and how long the new unit takes to pay back.
Your savings
Fill in the form and press the button.
How we work it out
Power in kW = cooling in BTU per hour / EER / 1000. One ton = 12,000 BTU per hour. We assume the compressor runs 70% of the hours the AC is on, and that each 1°C warmer setpoint cuts cooling energy by 4%. Both are our assumptions, the same as in our Kahramaa bill calculator. A month is 30 days. CO2 uses 0.58169 kg per kWh (Ember 2024). Default EER values of 8.5 (old) and 12 (new) are our examples. Use the numbers on your units.
Sources
Questions
What is EER on an AC?
EER is cooling output divided by power input, in BTU per hour per watt. A higher EER means less electricity for the same cooling. You find it on the energy label or the nameplate sticker.
How much can a new AC save in Qatar?
It depends on the EER gap and hours of use. Example: four 2 ton units, 12 hours a day for 8 months, going from EER 8.5 to EER 12 and setting 2°C warmer. That saves about 7,900 kWh a year, or about QAR 1,030 at QAR 0.13 per kWh, under our assumptions.
What is a ton of cooling?
One ton is 12,000 BTU per hour. A 1.5 ton split unit is 18,000 BTU per hour. A 2 ton unit is 24,000 BTU per hour.
Does raising the thermostat really help?
Yes. A warmer setpoint means the compressor runs less. We assume 4% less cooling energy per 1°C warmer. It is a rule of thumb, not a measured value for your home.
Does Qatar have an AC energy label?
Gulf states use energy efficiency labels for air conditioners. We could not confirm the current Qatar star thresholds from an official source, so this tool asks for the EER directly instead of a star rating.
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