The UAE has one of the highest cooling demands of any country in the world. Selecting the right air conditioning capacity is critical — undersized units run continuously without reaching temperature and fail prematurely, while oversized units short-cycle, create humidity problems, and waste electricity.
Our AC Cooling Load Calculator accounts for UAE’s unique climate zone, occupancy, window area, and insulation level to give you accurate BTU, tonnage, and kW requirements for any room.
How to Use This Calculator
- Enter room length, width, and ceiling height in metres
- Select UAE climate zone — coastal areas have higher humidity load than inland
- Choose insulation level — well-insulated rooms need smaller AC units
- Enter number of occupants and window area in m2
- Click Calculate for BTU/hr, tonnage, kW, and recommended split AC unit size
🇦🇪 UAE Tip: Inverter technology split AC units save 30 to 50 percent electricity compared to non-inverter units in UAE. Always choose 5-star UAE energy rating. Daikin, Mitsubishi Electric, and Carrier are the most reliable brands for UAE climate. Proper insulation of the building envelope can reduce AC unit size by 20 to 30 percent — saving both capital cost and running costs.
The Formula Explained
Cooling Load = (Volume x Zone BTU Factor) + (Window Area x 250 BTU) + (Occupants x 600 BTU) x Insulation Factor. Tonnage = BTU / 12,000. kW = BTU / 3,412.
Frequently Asked Questions
What AC size for a typical UAE bedroom?
A 15m2 bedroom typically needs a 9,000 BTU (0.75 ton) unit with good insulation, or 12,000 BTU (1 ton) with standard insulation. A 20m2 master bedroom typically needs 12,000 to 18,000 BTU depending on glazing and insulation.
How often should AC be serviced in UAE?
Every 3 months minimum for filter cleaning and condensate drain inspection. Annual full service including refrigerant check, coil cleaning, and electrical inspection. UAE dust blocks filters rapidly and reduces efficiency by up to 40 percent.
What DEWA energy rating should I choose?
Always choose the highest available star rating. In UAE, 5-star inverter units are widely available at similar prices to lower-rated units. The electricity saving over 10 years easily justifies any small price premium.
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