Every July and August, the same shock lands in thousands of Dubai inboxes: a DEWA bill double the winter amount. Cooling is the culprit — air conditioning dominates summer consumption in most homes — which is also good news, because it means a handful of AC habits control most of the bill.
Here is what actually moves the number, based on DEWA's own guidance.
The 24°C rule
DEWA recommends setting your AC to 24°C. Every degree cooler adds around 5 per cent to consumption, so a household running at 20°C all summer is paying roughly a fifth more for cooling than it needs to. Pair the thermostat with ceiling or standing fans: moving air feels several degrees cooler, letting you hold 24°C comfortably.
Two more AC habits with outsized impact:
- Clean the filters monthly in summer. Clogged filters force the unit to work harder for the same cooling.
- Replace units older than 10 years. Modern four- or five-star ESMA-rated models cut cooling consumption by up to 25 per cent. If you rent, this is the landlord's job — worth raising at renewal.
Habits that cost nothing
- Avoid heavy appliances between 12pm and 6pm. Running the washing machine, dryer and dishwasher outside peak afternoon hours eases both your bill and the grid.
- Keep the heat out. Curtains and blinds on sun-facing windows reduce the load your AC has to fight.
- Switch on Away Mode when you travel. DEWA's Away Mode feature manages consumption while you are on leave — most residents flying out for the summer never activate it.
Find the leaks before they find your bill
Water leaks are the silent line item. DEWA's High Water Usage Alert notifies you of abnormal consumption, and its Consumption Assessment Tool in the app benchmarks your usage against similar homes. Check tanks, washing machine connections, kitchens, bathrooms, outdoor taps and even walls — a slow leak runs 24 hours a day.
While you are in the app, review your daily consumption graph. A flat overnight electricity baseline that seems high usually points to an appliance that never sleeps.
One reminder for newcomers: a chunk of your DEWA bill is not consumption at all. The 5 per cent municipality housing fee arrives on the same invoice — our DEWA setup guide breaks down what each line means.
Key takeaway
Set the AC to 24°C, clean filters monthly, keep heavy appliances out of the 12pm–6pm window, and activate Away Mode when you travel. A 1°C thermostat change is worth about 5 per cent of consumption, and an ageing AC unit replaced with an efficient model saves up to a quarter of cooling costs.
FAQ
What temperature should I set my AC to in Dubai?
DEWA recommends 24°C. Each degree below that adds around 5 per cent to your consumption, and fans let 24°C feel cooler than it sounds.
Why is my DEWA bill high even though I was away?
Check three things: whether Away Mode was activated, whether the housing fee makes up much of the total, and whether a water leak or always-on appliance kept running. The app's consumption graphs show exactly when usage happened.
Do old AC units really cost more to run?
Yes. DEWA advises replacing units older than 10 years; efficient four- or five-star ESMA-rated models reduce cooling consumption by up to 25 per cent.
Is district cooling billed by DEWA?
No. In many towers, chiller charges come from a separate provider such as Emicool or Tabreed. These tips help with the DEWA portion; for chiller buildings, thermostat discipline still cuts the cooling invoice.
