Summer preparation usually means one thing in Dubai: calling someone to service the air conditioning. That is sensible, and it should stay on the list. But the AC is only the machine that removes heat. How much heat it has to remove is decided by the glass, the roof, the gaps around doors and the way the thermostats are set, and those are cheaper to deal with in March than in July.
This page splits the job in two: the checks an owner can do in an afternoon for nothing, and the work worth booking before the busy season. It ends with the measures we would not buy for summer at all.
Why the timing matters more than people think
Our calculation engine models a typical 250 m² villa with about 60 m² of double clear glass, a 135 m² roof and a 1,150 AED average monthly electricity bill, roughly 13,966 AED a year. Here is how that bill and the saving from a package of film, a cool roof, door seals and smart thermostats spread across the year, in survey mode, the conservative figure we would write into a contract after measuring the house:
| Month | Electricity bill | Saving with the package |
|---|---|---|
| January | 675 AED | 80 AED |
| March | 875 AED | 165 AED |
| April | 1,050 AED | 247 AED |
| May | 1,347 AED | 348 AED |
| June | 1,584 AED | 425 AED |
| July | 1,724 AED | 455 AED |
| August | 1,724 AED | 442 AED |
| September | 1,500 AED | 356 AED |
| November | 875 AED | 141 AED |
April to September carries 2,273 AED of the 3,089 AED annual saving, about 74%. November to February together carry about 400 AED. The practical consequence is simple: work finished at the end of March catches the whole hot season, while the same work finished at the start of June has already lost April and May, worth about 595 AED in survey mode on this villa and about 788 AED at the top of the honest range.
The reverse is also true, and worth saying. If you are reading this in October, there is no urgency. The months ahead are the cheapest of the year to run the house, and a survey in winter gives you time to plan, get community approval where it is needed and compare quotes without the pressure of a house that is already too hot.
What to check yourself, for free
None of these needs a contractor. Together they take an afternoon, and several of them are the same causes we list in why a DEWA bill suddenly jumps.
- Thermostat settings in every room. Look for units left at their lowest setting, rooms cooled all day while empty, and timers that were changed over the winter and never reset. A guest room cooled around the clock for a visitor who left in December is a common one.
- Air filters. Pull the filters on the indoor units and look at them. If they are grey, clean or replace them, or put it first on the list for the service visit.
- Doors and balcony sliders. Close each one on a strip of paper. If the paper slides out easily, cooled air is leaking at that opening all summer.
- Irrigation and the pool pump timer. Garden watering and filtration settings drift over the winter. They do not affect cooling, but a leaking irrigation line is one of the most expensive surprises on a summer bill.
- Which rooms are hot, and when. Walk the house at four in the afternoon on a sunny day in March. West-facing living rooms and top-floor bedrooms under the roof are usually the answer, and knowing that makes any survey faster.
Book the AC service early
Everyone in the city remembers the AC in May. Booking a service in February or March means you get a date that suits you, and if the technician finds a unit that is weak or a refrigerant problem, there is time to fix it before you need it. Ask for the filters, coils and condensate drains to be cleaned, and ask whether any unit is running constantly without reaching its set temperature.
If the answer is that a room never gets cool, resist the first suggestion to buy a bigger unit. A room that cannot be cooled is often a room taking too much sun through the glass or too much heat through the roof. We explain that diagnosis in AC not cooling and how a proper load calculation works in how big an AC a villa needs.
The work worth booking before April
These are the measures that actually move the summer bill, ranked by how fast they repay themselves. Prices are Essential-line figures for one measure on our standard 250 m² villa, as published on our pricing page; savings are the top of the honest range.
| Measure | Price | Saves per year | Pays back in |
|---|---|---|---|
| Mirror silver film | 8,000 AED | 3,201 AED | 30 months |
| Door and balcony seals | 1,550 AED | 581 AED | 32 months |
| Dual-reflective film | 8,000 AED | 2,517 AED | 38 months |
| Smart thermostats | 3,900 AED | 871 AED | 54 months |
| Clear ceramic film | 9,600 AED | 1,538 AED | 75 months |
Seals first, because they are cheap
Door and balcony seals are the smallest bill and one of the fastest paybacks on the list. If the paper test above failed on several openings, this is the obvious place to start, and it is a short job.
Film on the glass that takes the afternoon sun
On our standard villa, film accounts for about half of the package saving in survey mode, 1,531 of 3,089 AED a year, and it is the measure that keeps working with the view open. The darker and more reflective the film, the more it saves. Visible films can need approval from your developer or owners’ association, which is the main reason to start in winter rather than in April. The rules by community are in is window film allowed in your community, and the film types are explained on the window film page.
Thermostats, if the house is cooled while empty
Smart thermostats pay back more slowly than seals or film, but they suit a particular household well: one where rooms are cooled all day while everyone is at work or school. If your household already turns units off by hand, the case is weaker.
What we would not buy for the summer bill
This is the part a seasonal checklist usually leaves out. Three things we sell are worth having, but not as a way to make July cheaper.
- Cool roof coating, on its own. On our standard villa it saves about 308 AED a year in survey mode, because a post-2011 roof is already insulated and only a few percent of the heat landing on it gets through. A cool roof makes sense when the roof needs waterproofing anyway. Judged on electricity alone, it takes decades to pay back.
- Facade impregnation. A clear water-repellent treatment does not change the colour of the wall, so it does not change how much sun the wall absorbs. We sell facade protection for salt, water and dirt, and we do not put an energy figure on it.
- Pool deck coating. A textured reflective coating brings paving around the pool down by 15–25 °C, which is the difference between a deck you can walk on barefoot in the afternoon and one you cannot. That is a reason to do it before summer. A lower bill is not: the pool deck is outside, and the AC never sees it.
A simple timeline
| When | What to do |
|---|---|
| November – January | Look at last summer’s bills, walk the hot rooms, book a survey |
| January – February | Community approval for visible film, compare quotes |
| February – March | AC service, seals, film and any roof work |
| April | Reset thermostats and timers for the hot season |
| September | Compare the summer bill with last year’s |
Work on site takes two calendar days for a typical villa. Payment is 44% of the total on signature and the rest in three monthly instalments, so a job booked in February is fully paid around the time the hot months start to pay it back.
Where to go from here
The calculator runs the same engine on your villa type and your own bill, and shows the saving month by month. If you want the full ranking of measures and the reasoning behind each, it is on how to reduce a high DEWA bill. And if this summer has already started, the checks above still apply: the free ones cost nothing whenever you do them.