How Much Does It Cost to Run Air Conditioning in Brunei?
Hourly, monthly and yearly cooling costs at Brunei's current electricity prices, by unit size and efficiency, in local currency and U.S. dollars.
By Mark Curant·Updated
Quick answer
At B$0.08 per kWh (tariff in force since January 1, 2012), a typical 1.5 hp (12,000 BTU, 3.5 kW) inverter air conditioner, which uses about 0.70 kWh of electricity an hour, costs about B$0.06 an hour to run, or B$13 for a month at 8 hours a day. Over a year it comes to about B$140 in Bandar Seri Begawan (about $110). In U.S. terms the price is about 6.26¢/kWh, 66% less than the U.S. average.
Per hour
B$0.06
1.5 hp (3.5 kW) inverter, uses 0.70 kWh
Per month
B$13
8 hrs/day × 30 days
Per year, Bandar Seri Begawan
B$140
2,500 cooling hours (our estimate)
Your numbers in Brunei
Your AC now (efficiency 3.0)
B$233/yr
B$0.09/hr
New unit (efficiency 5.0)
B$140/yr
B$0.06/hr
You would save
B$93/yr
B$1,120 over 12 years
Efficiency = kW of cooling per kW of electricity over a season (our assumption for a typical new inverter split is 5.0; an old non-inverter or window unit is closer to 3). Hours start at our estimate for Bandar Seri Begawan and the price at B$0.08; change them for your home and your bill.
The price used here
What this table shows
- Price per kWh: the residential price for each kWh between 601 and 2,000 kWh a month (8 cents), the band an air-conditioned home usually reaches; the first 600 kWh cost 1 cent each.
- Cost per hour: one 1.5 hp (12,000 BTU, 3.5 kW) inverter split running for an hour at full power (0.70 kWh × the price).
| Utility | Area covered | Price per kWh | Same in U.S. cents | Cost per hour of ACone 1.5 hp inverter split |
|---|---|---|---|---|
| Department of Electrical Services / BPC | the whole country | B$0.08 | 6.26¢ | B$0.06 |
Cost by unit size
In Brunei, air conditioners are sold by horsepower: a 1.5 hp unit is about 12,000 BTU (3.5 kW) of cooling. The size is how much cooling the unit puts out, not the electricity it uses.
All at a seasonal efficiency of 5.0 (our assumption for a typical new inverter split) and B$0.08 per kWh:
| Unit size (cooling output) | Typical use | Cost per hour of running | Cost per month (8 hours a day) | Cost per year in Bandar Seri Begawan (2,500 hours) |
|---|---|---|---|---|
| 1 hp · 2.5 kW (9,000 BTU) | bedroom | B$0.04 | B$10 | B$100 |
| 1.5 hp · 3.5 kW (12,000 BTU) | large bedroom or living room | B$0.06 | B$13 | B$140 |
| 2 hp · 5 kW (18,000 BTU) | large living room | B$0.08 | B$19 | B$200 |
| 2.5 hp · 7 kW (24,000 BTU) | open-plan living area | B$0.11 | B$27 | B$280 |
| Portable | one room, no installation | B$0.08 | B$19 | B$200 |
What a more efficient unit saves
Seasonal efficiency is how much cooling a unit delivers for each kW of electricity over a whole season. The higher it is, the less electricity it needs for the same cooling. Yearly cost of one 1.5 hp (3.5 kW) unit in Bandar Seri Begawan (2,500 hours a year):
| Seasonal efficiency | What it's like | Electricity per hour | Cost per year | Saved per year vs an old 3.0 unit |
|---|---|---|---|---|
| 3.0 | old non-inverter or window unit | 1.17 kWh | B$233 | — |
| 4.0 | older or basic inverter unit | 0.88 kWh | B$175 | B$58 |
| 5.0 | typical new inverter split | 0.70 kWh | B$140 | B$93 |
| 6.0 | efficient model | 0.58 kWh | B$117 | B$117 |
| 7.0 | top models | 0.50 kWh | B$100 | B$133 |
What to know about electricity prices in Brunei
Brunei's household electricity is heavily subsidised. The first 600 kWh a month cost just 1 cent each, the next 1,400 kWh 8 cents, then 10 and 12 cents, prices that haven't changed since 2012.
Because power is so cheap, air conditioning is used heavily, and the hot, humid climate means it runs most of the year. Even so, one unit costs less to run than almost anywhere else in this guide.
Cutting the cost
- Set 25–26°C rather than 20–22°C, and run a ceiling or stand fan with it.
- Close curtains on sunny windows, and keep doors closed so you only cool the room you're in.
- Clean the indoor unit's filters every two to four weeks; humid, dusty air clogs them fast.
- Have the unit serviced (coil and drain cleaning) about once a year.
- When you replace a unit, choose an inverter model with a high energy label rating.
How Brunei compares
Japan
¥38.87/kWh
≈ 24.62¢ US
Singapore
S$0.3116/kWh
≈ 24.40¢ US
Philippines
₱15.06/kWh
≈ 23.79¢ US
Hong Kong
HK$1.699/kWh
≈ 21.65¢ US
South Korea
₩257.6/kWh
≈ 19.43¢ US
Cambodia
៛730/kWh
≈ 17.93¢ US
Vietnam
₫3,618/kWh
≈ 14.11¢ US
Thailand
฿4.62/kWh
≈ 13.77¢ US
Malaysia
RM0.4893/kWh
≈ 11.99¢ US
Taiwan
NT$3.80/kWh
≈ 11.73¢ US
China
CN¥0.6670/kWh
≈ 9.99¢ US
Indonesia
Rp1,444.70/kWh
≈ 8.01¢ US
Brunei: ≈ 6.26¢ US/kWh. U.S. average: 18.31¢/kWh (July 2026). See costs in every U.S. state or Australia.
Frequently asked questions
How much does it cost to run an air conditioner per hour in Brunei?
About B$0.06 an hour in Bandar Seri Begawan for a typical 1.5 hp (12,000 BTU, 3.5 kW) inverter split, which uses about 0.70 kWh of electricity an hour, at B$0.08 per kWh. A 1 hp (9,000 BTU) bedroom unit costs about B$0.04 an hour, an old non-inverter 1.5 hp unit about B$0.09, and a portable unit about B$0.08.
How much does air conditioning add to a monthly bill in Brunei?
Running a 1.5 hp inverter split 8 hours a day for 30 days uses about 168 kWh, or about B$13. Over a year in Bandar Seri Begawan, at our estimate of 2,500 cooling hours, one unit costs about B$140 (about $110).
Is an inverter air conditioner worth it?
Where the AC runs as many hours as it does in Bandar Seri Begawan, usually yes. Replacing an old non-inverter 1.5 hp unit (efficiency about 3) with a typical inverter split (about 5.0) saves about B$93 a year at 2,500 hours.
How we calculated this
Electricity used (kWh) = cooling capacity (kW) ÷ seasonal efficiency × hours. Cost = kWh × price. Price: Department of Electrical Services, Brunei Darussalam, residential (Tariff A) four-tier tariff from January 1, 2012 (1 / 8 / 10 / 12 cents a kWh). U.S. figures use 1 BND = $0.7830 (October 21, 2026, European Central Bank). Cooling hours are our estimate for each city. To check your own price, divide the energy part of your bill by the kWh used.