10 Energy-Saving Tips for Your HVAC System
A few small adjustments can make a big difference in your comfort and energy bills. Here are ten easy ways to help your HVAC system run smarter — not harder.
1. Change or Clean Filters Regularly
Dirty filters restrict airflow, forcing your system to work longer and use more electricity. Replace disposable filters every 60–90 days or clean washable ones monthly.
2. Use a Programmable or Smart Thermostat
Set your thermostat to automatically raise or lower the temperature when you’re asleep or away. Smart thermostats can cut energy use by 10–15% per year.
3. Seal Duct Leaks
Leaky ducts can waste up to 30% of conditioned air. Seal gaps with mastic or foil tape, not standard duct tape. Well-sealed ducts mean more air reaches your rooms.
4. Keep Vents Open and Clear
Blocked vents throw off airflow balance and raise pressure in the system. Avoid closing vents in unused rooms and keep furniture or rugs from covering registers.
5. Schedule Regular Maintenance
Professional tune-ups keep your coils clean, refrigerant levels correct, and motors efficient. Schedule maintenance at least once a year — ideally before summer and winter.
6. Upgrade to Energy-Efficient Equipment
If your system is 10–15 years old, newer models with higher SEER2 or HSPF2 ratings can save 20–40% on energy use while improving comfort.
7. Use Ceiling Fans Strategically
Fans don’t cool air, but they circulate it. In summer, set them counterclockwise to push air down. In winter, reverse direction to pull warm air up and spread it evenly.
8. Check Home Insulation
Poor insulation lets heat escape in winter and creep in during summer. Adding attic or wall insulation reduces HVAC strain and keeps indoor temps stable.
9. Manage Sunlight & Shade
Close blinds on hot days and open them on sunny winter mornings. Window films or shades can reduce cooling costs by blocking radiant heat.
10. Don’t Over-Adjust the Thermostat
Changing your thermostat setting drastically doesn’t heat or cool faster — it only wastes energy. Adjust in small increments for steady comfort and efficiency.
Bonus: Use Energy-Saving Mode
Some HVAC systems and thermostats include an “Eco” or “Energy Saver” mode that automatically optimizes fan speeds and compressor cycles. Enable it for automatic savings.
FAQ
What temperature should I set my thermostat to?
The U.S. Department of Energy recommends 68°F in winter and 78°F in summer when you’re home — and adjusting 7–10°F while away can save up to 10% a year.
How much can maintenance really save?
Regular HVAC maintenance can improve efficiency by 10–20% and prevent costly breakdowns by catching issues early.
Related reads:
Thermostats & Smart Controls · Common HVAC Problems & Fixes
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Filters · Smart Thermostats · Maintenance Accessories