My name is Thomas Berg, a Norwegian who has lived in Hanoi, Vietnam, for the past six years. When I first moved here from Oslo, I did what most Europeans do — I installed a powerful air conditioner and used it heavily during the hot, humid months. My electricity bills were shocking. One particularly brutal summer month in 2024, my bill reached $138 — more than double what I paid for heating my entire apartment in Norway during winter.
That was the moment I decided to run a proper, full-year experiment: Could I replace most of my air conditioner usage with ceiling fans and still stay comfortable? I tracked every kWh, every dollar, temperature, humidity, and my own comfort level from April 2025 to March 2026.
This is not a theoretical comparison or manufacturer data. These are real numbers from my 85 m² apartment in Hanoi’s Tay Ho district, with real electricity rates, real weather conditions, and real daily life as a remote-working European.
My Testing Setup – One Year, Two Systems
I kept two identical bedrooms for the test:
Room A (Air Conditioner Room):
1.5 HP inverter air conditioner (Daikin, installed 2024)
Used as my main cooling method
Room B (Ceiling Fan Room):
High-quality 52-inch DC inverter ceiling fan (Panasonic, 2025 model)
No air conditioner at all
Both rooms had the same orientation, same window size, same furniture, and were used similarly (home office + sleeping). I logged:
Daily electricity consumption (separate sub-meters)
Average temperature and humidity (using calibrated sensors)
My personal comfort score (1–10)
Total cost in USD (at current Vietnam electricity rates of approximately $0.105/kWh for my usage tier)
Full-Year Results: The Numbers Don’t Lie
Here are the complete 12-month results from my real usage:
Key Takeaways from the Full Year:
Total savings using ceiling fan as primary cooling: $139.22 over 12 months
The ceiling fan used only 17.3% of the electricity compared to the air conditioner
Biggest savings occurred from May to September (hot/humid season)
In cooler months (November–March), the difference was minimal
Comfort Comparison: How It Actually Felt
This was the most surprising part for me as a European.
Air Conditioner Room:
Very cool and dry (excellent for sleeping)
Fast temperature drop
Dry air caused dry skin and occasional sore throat
Very quiet once running
Ceiling Fan Room:
Felt comfortable down to about 27–28°C with good airflow
Air movement made 29–30°C feel acceptable
Humidity remained higher (better for skin and breathing)
Slight noise from the fan (acceptable DC motor)
My personal comfort score:
AC Room: Average 8.7/10
Fan Room: Average 7.4/10 during hot months
I ended up using the AC only when temperatures went above 31°C or when I had guests. For 70–75% of the year, the ceiling fan was perfectly sufficient.
Before vs After: My Electricity Bill Reality
Before (Heavy AC usage):
Average monthly bill during hot season: $112
Annual electricity cost for cooling: ≈ $485
After (Smart usage – Fan primary, AC supplemental):
Average monthly bill during hot season: $79
Annual electricity cost for cooling: ≈ $312
Total annual savings: $173
This doesn’t include the reduced maintenance cost and longer lifespan of the air conditioner since it ran far fewer hours.
Practical Tips From a European Living in Vietnam
Here’s what actually worked for me:
Use the ceiling fan correctly — Set it to counterclockwise (summer mode) to push air downward.
Combine fan + AC strategically — Run the AC for 30–60 minutes to drop the temperature, then switch to fan only. This saved me a lot.
Improve airflow — Keep doors open, use cross ventilation in the evening.
Choose a good DC inverter fan — The difference in noise and power consumption compared to old AC motors is massive.
Who Should Stick with Air Conditioning?
From my experience:
People with respiratory issues or allergies often prefer AC because it dehumidifies the air.
Those who sleep very poorly in heat may still need AC at night.
If you work from home in a small room, a good fan is often enough.
Final Verdict From My One-Year Test
As a European who grew up with cold weather, I was skeptical about relying on ceiling fans. But after a full year of real data, I can confidently say:
Ceiling fans can replace 70–80% of air conditioner usage in Vietnam’s climate with excellent comfort and massive savings.
The $139+ I saved this year is real money. More importantly, my apartment feels less dry, my skin is better, and I have much lower electricity bills.
If you’re tired of high electricity bills in Vietnam (or any hot climate), I strongly recommend running your own 2–3 month test. Start by using the fan more intentionally before turning on the AC. You might be surprised how much you can save while staying comfortable.
Have you tried relying more on ceiling fans instead of air conditioning? What was your experience with comfort and electricity bills? Share your thoughts in the comments below — I read every one and will reply with specific advice based on your room size and location.