Air conditioning typically accounts for 40-60% of home electricity bills in hot climates. Here are 15 proven ways to reduce that cost.
No-Cost Changes
1. Raise the Thermostat
Each degree higher saves 6-8% on cooling costs. 25°C is comfortable for most people and significantly cheaper than 22°C.
2. Use Timers
Don't cool empty rooms. Set timers to start cooling 15 minutes before you arrive home.
3. Keep Doors Closed
Cool only the rooms you're using. Close doors to uncooled areas.
4. Use Sleep Mode
Sleep mode gradually raises temperature overnight when you don't need intense cooling.
5. Clean Filters Monthly
Dirty filters reduce airflow and efficiency by up to 15%.
Low-Cost Improvements
6. Install Curtains or Blinds
Block direct sunlight, especially on west-facing windows. Can reduce heat gain by 30%.
7. Use Fans
Ceiling or standing fans allow you to raise the thermostat 2-3°C while feeling just as cool.
8. Seal Air Leaks
Weather stripping around doors and windows keeps cool air in.
9. Add Window Film
Reflective window film blocks solar heat for a few hundred baht per window.
Medium Investment
10. Upgrade to Inverter
Inverter ACs use 30-50% less electricity than fixed-speed units.
11. Add Insulation
Roof insulation can reduce cooling needs by 40% or more.
12. Plant Shade Trees
Trees shading your roof and walls reduce heat gain naturally.
Usage Habits
13. Pre-Cool Strategically
Cool rooms during cheaper off-peak hours if your electricity rate varies.
14. Reduce Internal Heat
Cook outside, use LED bulbs, and run appliances in the evening.
15. Regular Maintenance
Annual professional servicing maintains peak efficiency.
Calculate Your Savings
Use our Electricity Cost Calculator to see current costs, and Seasonal Optimizer for year-round strategies.