Bay Area electricity rates are among the highest in the nation. These strategies help you stay cool without dreading your utility bill.
1. Raise Your Thermostat
Set your thermostat to 78°F when home and 85°F when away. Each degree lower increases energy use by about 3%.
Use a programmable or smart thermostat to automate temperature changes based on your schedule.
2. Use Fans Strategically
Ceiling fans let you raise the thermostat 4°F without reducing comfort. They cost pennies per hour compared to dollars for AC.
Remember: Fans cool people, not rooms. Turn them off when you leave.
3. Block Solar Heat
Up to 30% of cooling energy goes toward counteracting solar heat gain.
- Close blinds and curtains during peak sun hours
- Install reflective window film on south and west-facing windows
- Consider exterior shading (awnings, trees, shade screens)
4. Seal Air Leaks
Cool air escaping equals wasted money.
- Weather-strip doors and windows
- Caulk gaps around window frames
- Seal ductwork connections
- Check attic access points
5. Maintain Your System
A well-maintained AC runs 10-15% more efficiently.
- Change filters monthly during summer
- Schedule annual professional tune-ups
- Keep outdoor unit clean and clear of debris
6. Reduce Internal Heat
Every appliance generates heat your AC must remove.
- Use exhaust fans when cooking
- Run dishwashers and dryers in evening
- Switch to LED bulbs (90% less heat than incandescent)
- Grill outside instead of using the oven
7. Optimize Ductwork
Leaky or poorly insulated ducts waste 20-30% of conditioned air.
- Have ducts professionally sealed
- Add insulation to ducts in unconditioned spaces
- Close vents in unused rooms (carefully—don't close more than 20%)
8. Use Zoning
If you have a zoned system, cool only occupied areas. If not, close doors to unused rooms and focus cooling where you need it.
9. Take Advantage of Cool Nights
When evening temperatures drop, open windows to let cool air in. In the morning, close windows and blinds to trap the cool air.
10. Consider Upgrades
If your AC is over 10 years old, a modern high-efficiency unit could cut cooling costs by 20-40%.
Many utilities offer rebates for efficient equipment, making upgrades more affordable.
Quick Wins
Start with the free and low-cost items (thermostat adjustment, fans, closing blinds) before investing in upgrades. You might be surprised how much you can save with simple behavior changes.