How to Cut Your DEWA Bill When the AC Runs All Summer

Every June the same thing happens. The bill arrives, you blink twice, and you start eyeing the air conditioner like it owes you money. In a Gulf apartment, cooling is usually 60 to 70 percent of summer electricity, so it is also the only number worth fighting over. The good news: the biggest savings come from habits and maintenance, not from buying anything.

Set the thermostat at 24, not 19

The single most expensive habit is treating the thermostat like a fridge dial. Every degree you drop below about 24°C adds meaningfully to runtime. Set it to 24 when you are home and 27 to 28 when you are out, and let the unit cycle instead of running flat out. A cheap programmable thermostat or a smart plug timer pays for itself in one billing cycle. If 24 feels warm, add a ceiling or pedestal fan; moving air makes a room feel two to three degrees cooler for a fraction of the wattage.

Clean the filter, then the coil

A clogged filter is the quiet villain. Pop the front grille, slide out the mesh filter, and wash it under the tap every two to three weeks in summer. Let it dry fully before refitting. A dirty filter forces the compressor to work harder for less cold air, the worst of both worlds. Once a year, get the coils and drain professionally cleaned before the season starts; a unit that cannot shed heat will run constantly and ice up.

Block the sun before it gets in

Sunlight through glass is a heater you did not ask for, and west- and south-facing windows are the worst offenders. Close blackout curtains or fit reflective window film on the rooms that bake in the afternoon, and keep them shut while you are at work. A few dirhams of film on the worst window beats fighting the heat with the compressor all day.

Cool the rooms you use, seal the ones you don't

There is no prize for cooling an empty guest room. Shut its door and close its vent. Use draught excluders or a rolled towel under doors so cold air stays where people actually are. If your flat has a split unit per room, only run the ones in use.

Move heat-making chores to the night

The oven, the dryer and the iron all dump heat into rooms your AC then has to remove. Cook and do laundry in the cooler evening hours, hang clothes to dry on a shaded balcony instead of tumble-drying, and switch to LED bulbs, which run cool. Unplug the constellation of idle chargers and the TV at the wall; standby draw is small per device but constant.

None of this is glamorous, and that is the point. Clean filter, curtains shut, thermostat at 24, fans on, heat-chores after sunset. Do all five and a typical two-bedroom flat can knock 15 to 25 percent off the summer peak, which is real money back in your pocket and one less reason to dread the DEWA notification.