In Phoenix Metro, HVAC accounts for 50–70% of your total home energy bill. That's more than the rest of the house combined. The good news: there are practical energy saving HVAC tips every homeowner can implement to cut those costs significantly — without sacrificing comfort.
Tip 1: Use a Smart or Programmable Thermostat
This is the single highest-impact change most homeowners can make. A smart thermostat automatically adjusts temperatures based on your schedule — cooling less when you're away at work, and pre-cooling before you arrive home. According to Energy Star, a programmable thermostat can save homeowners up to 10% per year on heating and cooling costs.
In Phoenix, setting your thermostat to 80°F (or higher) while you're away and 74–76°F when you're home is a common strategy that saves significantly on APS and SRP bills.
Tip 2: Change Your Air Filter Every 30 Days
A clogged air filter is the most common and most easily preventable cause of HVAC inefficiency. In Phoenix's dusty desert environment, filters load up faster than in other climates. A dirty filter forces your system to work harder, uses more electricity, and stresses the components. A fresh filter is one of the most cost-effective energy saving HVAC tips you can follow.
Tip 3: Seal and Insulate Your Home
Your AC can only do so much if heat is pouring in through gaps around windows, doors, and the attic. In Phoenix, attic temperatures regularly reach 150–160°F in summer. Good attic insulation (R-38 or higher is recommended for Arizona) is one of the best investments a homeowner can make. Weatherstripping on doors and caulking around windows also make a measurable difference.
Tip 4: Use Ceiling Fans Strategically
Ceiling fans don't cool the air — they create a wind chill effect that makes you feel cooler. Running ceiling fans allows you to set the thermostat 4°F higher with the same comfort level. In summer, fans should spin counterclockwise (when looking up at them). In winter, reverse them clockwise to push warm air down from the ceiling.
Tip 5: Keep the Outdoor Condenser Unit Clean
Your outdoor condenser unit rejects heat from your home to the outside air. If the condenser coils are dirty or blocked, the system has to work harder — reducing efficiency and stressing the compressor. Keep the area around the unit clear, and have the coils professionally cleaned during your annual tune-up.
Tip 6: Close Window Coverings During the Day
Solar heat gain through windows is a major source of cooling load in Phoenix. Closing blinds, shades, or curtains on south and west-facing windows during peak sun hours (10 AM – 4 PM) can reduce cooling load significantly. Solar shades and low-E window film are more permanent solutions worth considering.
Tip 7: Schedule Twice-Yearly HVAC Maintenance
A well-maintained HVAC system runs 15–30% more efficiently than a neglected one. Professional tune-ups catch issues early, ensure proper refrigerant charge, and clean components that reduce efficiency over time. This is the most impactful professional maintenance step homeowners can take. Check out our free AC tune-up offer and learn how often to schedule HVAC maintenance.
Tip 8: Consider Upgrading to a High-Efficiency System
If your AC is over 12 years old and running a SEER rating below 14, upgrading to a modern high-efficiency system (18+ SEER2) can reduce your cooling energy use by 30–40%. Combined with available APS and SRP rebates, the payback period is often 3–5 years in Phoenix's climate.
Tip 9: Reduce Internal Heat Loads
Appliances, lighting, and cooking all add heat to your home that the AC has to remove. Running the dishwasher, oven, and dryer in the evening rather than mid-afternoon reduces peak cooling demand. LED lighting produces far less heat than incandescent bulbs and uses 75% less energy.
Tip 10: Check Your Ductwork for Leaks
The U.S. Department of Energy estimates that the typical home loses 20–30% of conditioned air through leaks in the ductwork. In a Phoenix home with attic ducts running through 150°F heat, duct leaks can be a massive source of energy waste. A duct pressure test can identify significant leaks that are costing you money every day.
Want to Cut Your Energy Bills?
Sapper HVAC provides professional maintenance, efficiency assessments, and system upgrades across Phoenix Metro. Veteran-owned, AZ ROC #360142.
Call Sapper HVAC TodayFrequently Asked Questions
What temperature should I set my thermostat in Phoenix to save money?
Energy Star recommends 78°F when you're home and 85°F (or off) when away. In practice, most Phoenix homeowners find 74–76°F comfortable when home. Every degree higher saves about 3% on cooling costs.
Does closing vents in unused rooms save energy?
No — and it can actually harm your system. Closing vents increases pressure in the duct system, which strains the blower motor and can cause coil icing. If you want zone control, consider a mini-split system or a zoning system installed by a professional.
How much can a high-efficiency AC save me monthly?
Upgrading from a 14 SEER to an 18 SEER system typically saves 20–25% on cooling costs. For a Phoenix home spending $200–$300/month on summer cooling, that's $40–$75 per month — or $300–$500 per season.