10 Most Effective Ways to Save Money on AC This Summer

To save money on AC this summer, set the right thermostat temperature, use a smart or programmable thermostat, replace or clean air filters, and schedule routine AC maintenance to improve your air conditioner’s efficiency. Additionally, seal windows and doors, improve home insulation, use ceiling fans, block heat with curtains or shades, reduce indoor heat from appliances, and upgrade to an energy-efficient air conditioner to minimize cooling costs and reduce unnecessary energy consumption. 

Using your air conditioner efficiently, maintaining the recommended thermostat settings, and preparing your home before summer can further improve cooling performance and lower operating costs. Choosing the right AC system, upgrading to energy-efficient features, and understanding factors such as insulation, humidity, electricity rates, and thermostat settings can significantly reduce cooling costs. If your AC runs constantly, cools unevenly, requires frequent repairs, or has not been serviced in over a year, contact an HVAC professional to restore efficiency and prevent higher energy bills.

10 most effective ways to save money on AC this summer are:

1. Set the Right Thermostat Temperature
2. Use a Smart or Programmable Thermostat
3. Replace or Clean Air Filters
4. Schedule Routine AC Maintenance
5. Seal Windows and Doors
6. Improve Home Insulation
7. Use Ceiling Fans to Reduce AC Runtime
8. Block Heat With Curtains or Shades
9. Reduce Indoor Heat From Appliances
10. Upgrade to an Energy-Efficient Air Conditioner

• Set the Right Thermostat Temperature

Set your thermostat to 78°F (26°C) when you are at home and awake to balance comfort and energy savings. The U.S. Department of Energy recommends setting your thermostat to 78°F (26°C) when you are at home and awake. When you are away from home for more than a couple of hours, raise the thermostat by 7°F to 10°F (or set it to approximately 85°F) to reduce cooling demand and save up to 10% annually on heating and cooling costs. 

Every degree you raise your thermostat above 72°F can slash your cooling bill by roughly 3% to 5%. Avoid setting the thermostat to an extremely low temperature, as it will not cool your home faster. Instead, the system will run longer and use more energy. Wear lightweight, breathable clothing indoors so you can stay comfortable while keeping the thermostat at an energy-efficient setting.

• Use a Smart or Programmable Thermostat

A smart or programmable thermostat automates your daily temperature schedules, eliminating energy waste caused by manual oversight or forgotten adjustments. By automatically dialing back cooling while you are at work or asleep and restoring comfort right before you return, these devices keep your home efficient around the clock. Advanced smart models go even further by analyzing local weather forecasts and occupancy patterns to micro-adjust running times.

Choose a thermostat with geofencing technology to automatically adjust cooling when your home is empty. Also, use Auto mode instead of On mode, as the fan runs only when cooling is needed and stops after reaching the set temperature. In On mode, the fan runs continuously, increasing unnecessary energy consumption. You can also monitor energy usage and adjust settings remotely through a mobile app.

• Replace or Clean Air Filters

Inspect your air filter every month and replace it every 30 to 90 days, or more frequently during heavy summer use. A clean air filter allows unrestricted airflow across the evaporator coil, helping the blower motor and compressor operate efficiently. Replacing a dirty filter reduces strain on the HVAC system, improves cooling performance, lowers energy consumption, and helps extend the lifespan of critical components.

Replace disposable filters or wash reusable filters every one to three months, depending on the manufacturer’s recommendations and household conditions. Clean filters improve airflow, maintain better indoor air quality, and reduce unnecessary strain on your cooling system, allowing it to operate efficiently throughout the season.

• Schedule Routine AC Maintenance

Lower your summer cooling expenses by scheduling routine AC maintenance before the hottest months arrive, as a well-maintained system consumes less energy while delivering consistent performance. Dust buildup, low refrigerant levels, and worn components force the air conditioner to work harder, increasing electricity usage over time. Have a certified HVAC technician inspect evaporator coils, condenser coils, refrigerant levels, electrical connections, and moving parts.

Routine servicing also identifies small mechanical issues before they become expensive repairs. Addressing these problems early helps prevent unexpected breakdowns and extends the lifespan of your air conditioning system.

• Seal Windows and Doors

Seal gaps and cracks around windows, exterior doors, and other openings to prevent hot, humid outdoor air from entering your home. Reducing air leaks helps keep cooled air inside, minimizes the workload on your air conditioner, improves indoor comfort, and increases overall energy efficiency. Gaps, cracks, and damaged seals let conditioned air leak outside while allowing hot outdoor air to enter. This constant air exchange forces your cooling system to run longer and consume more electricity.

Apply weatherstripping around doors and use silicone caulk to seal window gaps. Inspect areas where plumbing pipes, electrical wiring, and utility lines enter your home, as these openings commonly contribute to hidden air leaks and higher cooling bills.

• Improve Home Insulation

Cut your air conditioning expenses this summer by improving your home’s insulation, which minimizes heat transfer and reduces the workload on your cooling system. Proper insulation in the attic, walls, and floors acts as a thermal barrier that keeps outdoor heat from entering your living spaces. This allows your air conditioner to maintain comfortable temperatures while using less energy.

Inspect your attic insulation to ensure it meets the recommended R-value for your climate zone. Upgrading insulation provides long-term energy savings, improves indoor comfort, and helps maintain stable temperatures throughout the hottest days of summer.

• Use Ceiling Fans to Reduce AC Runtime

Set your ceiling fan to rotate counterclockwise at a higher speed during the summer to improve indoor comfort and reduce the workload on your air conditioner. The downward airflow creates a wind-chill effect that makes the room feel 3°F to 4°F cooler than the actual temperature, allowing you to raise the thermostat setting without sacrificing comfort and helping lower cooling energy costs.

 Use ceiling fans to rotate counterclockwise during summer so they push cool air downward. Turn fans off whenever you leave a room because they cool people rather than the space itself. Using ceiling fans correctly helps reduce AC runtime and lowers electricity consumption.

• Block Heat With Curtains or Shades

Block direct sunlight from entering your home by closing blinds, curtains, or shades, especially on south- and west-facing windows during the hottest part of the day. Windows exposed to strong sunlight increase indoor temperatures, forcing your cooling system to consume more electricity to maintain a comfortable environment. Reducing solar heat gain keeps indoor spaces naturally cooler.

Keep south-facing and west-facing curtains or blinds closed during peak afternoon hours. Install blackout curtains, reflective window coverings, or exterior solar screens, and consider planting shade trees or adding awnings for extra protection against heat.

• Reduce Indoor Heat From Appliances

Limit the use of heat-producing appliances during the hottest hours of the day. Ovens, stovetops, dishwashers, clothes dryers, and washing machines release heat and humidity that increase the indoor cooling load, forcing your air conditioner to work longer.

Prepare meals using a microwave, slow cooker, or outdoor grill instead of a conventional oven during warm afternoons. Schedule laundry and dishwasher cycles early in the morning or later in the evening when outdoor temperatures are lower to help maintain a cooler indoor environment.

• Upgrade to an Energy-Efficient Air Conditioner

If your current air conditioner is over 10 to 15 years old, replacing it with a modern high-SEER2 (Seasonal Energy Efficiency Ratio 2) system or variable-speed heat pump delivers dramatic energy reductions. Older units operate on fixed-speed compressors that consume maximum power every time they turn on, whereas modern units scale power up or down dynamically to match actual cooling demands.

Upgrading to an ENERGY STAR certified unit can cut your cooling energy consumption by 20% to 50% compared to older models. While requiring an upfront investment, modern systems quickly offset their cost through lower monthly utility bills, superior humidity control, and local utility rebates.

How Does Regular Maintenance Improve AC Efficiency and Save Money?

Regular maintenance improves AC efficiency and saves money by keeping your cooling system clean, properly calibrated, and operating at peak performance. Routine servicing reduces energy consumption, improves airflow, prevents unnecessary wear on critical components, and identifies minor issues before they turn into costly repairs. Scheduling professional maintenance before summer also helps your air conditioner deliver consistent cooling while extending its lifespan.

To get the most value from routine maintenance, follow these 5 energy-efficient AC practices:

1. Use Auto mode instead of On mode: Set your thermostat to Auto so the fan operates only during active cooling cycles and stops once the desired temperature is reached. In On mode, the fan continues running even when the compressor is off, resulting in unnecessary electricity consumption.
2. Allow your AC to cycle naturally: Let the AC system turn on and off as needed to maintain the set temperature. Contrary to a common myth, keeping your air conditioner running continuously does not save energy and often leads to higher utility bills.
3. Program your thermostat for daily routines: Use a smart or programmable thermostat to automatically raise the temperature when you are away or asleep and restore a comfortable setting before you return. This reduces unnecessary cooling without affecting comfort.
4. Avoid constantly adjusting the thermostat: Lowering the thermostat significantly will not cool your home faster. Instead, it causes the system to run longer until the selected temperature is reached, increasing energy usage.
5. Fix minor problems: Address refrigerant leaks, worn electrical connections, unusual noises, or restricted airflow as soon as they are detected. Early repairs keep the system running efficiently and help avoid expensive emergency breakdowns.

What Is the Best AC Temperature to Save Money?

The best AC temperature to save money while maintaining a comfortable home is 78°F (26°C) when you are indoors and awake. This temperature provides an ideal balance between comfort and energy efficiency. For every 1°F you raise the thermostat above 72°F, you can reduce cooling costs by approximately 3% to 5%. 

For additional savings, set the thermostat to 82°F-85°F when you are away to avoid cooling an empty home, and adjust it to 72°F-74°F while sleeping if you prefer a cooler sleeping environment, though keeping it closer to 78°F saves more energy. When you’re away for more than two hours, raise the thermostat by 7°F to 10°F (up to 85°F) to save up to 10% on annual heating and cooling costs.  A smart or programmable thermostat can automate these temperature changes and maximize energy savings.

What Home Preparation Steps Can Help Reduce AC Costs?

The home preparation steps that can help reduce AC costs are sealing air leaks, improving insulation, blocking solar heat, maintaining proper airflow, and servicing your air conditioning system before summer. These improvements reduce heat entering your home, prevent conditioned air from escaping, and allow your air conditioner to cool more efficiently with less energy.

5 home preparation steps that can help reduce AC Costs are:

1. Seal windows and doors: Close gaps and cracks with weatherstripping and silicone caulk to prevent conditioned air from escaping and hot outdoor air from entering.
2. Improve attic and wall insulation: Add or upgrade insulation to reduce heat transfer and keep indoor temperatures more stable throughout the day.
3. Install thermal or blackout curtains: Block direct sunlight on south- and west-facing windows to reduce solar heat gain and lower indoor temperatures.
4. Clean or replace HVAC air filters: Replace or wash filters every 30 to 60 days to maintain proper airflow and prevent the AC from working harder than necessary.
5. Schedule professional AC maintenance: Have an AC technician inspect, clean, and service your system before summer to maximize efficiency and prevent unexpected breakdowns.

How Do Different Types of AC Units Affect Savings?

 Different types of AC units affect energy savings by varying in cooling efficiency, operating technology, and the area they are designed to cool. Central air conditioning systems are best for efficiently cooling entire homes, whereas window air conditioners provide affordable savings through targeted room cooling, and heat pumps reduce year-round heating and cooling costs. In contrast, inverter air conditioners lower electricity consumption with variable-speed operation, and high-efficiency air conditioners maximize long-term energy savings through advanced technology and higher SEER ratings.

Here is how different types of AC units affect savings:

• Central Air Conditioning System

If you need to cool an entire house with multiple bedrooms, a central air conditioning system offers the greatest convenience, but your energy savings depend on how efficiently the system operates. Older units with low SEER ratings and leaking ductwork can waste a significant amount of cooled air, increasing electricity bills. Modern central AC systems provide consistent whole-home cooling and become more economical when combined with smart zoning dampers that direct cooling only to occupied rooms. Routine duct sealing and professional maintenance further improve efficiency while reducing unnecessary energy loss.

• Window Air Conditioning Unit

When your cooling needs are limited to a bedroom, home office, or apartment, a window air conditioner provides an affordable way to reduce electricity costs without cooling unused spaces. These compact units have lower purchase and installation costs than whole-home systems, making them ideal for localized cooling. They allow homeowners to keep the central thermostat higher or avoid using central AC altogether. However, they are less practical for cooling multiple rooms at the same time. For the best energy savings, choose an appropriately sized unit, as an oversized or undersized window AC can reduce efficiency and increase electricity consumption.

• Heat Pump System

For homeowners looking to lower both heating and cooling costs, a heat pump provides an energy-efficient solution that delivers year-round comfort. Unlike traditional heating systems that burn fuel to generate heat, heat pumps transfer ambient heat between indoor and outdoor environments. Modern heat pumps achieve a Coefficient of Performance (COP) exceeding 3, meaning they deliver more thermal energy than the electrical energy they consume. This high efficiency helps reduce utility bills throughout most of the year, although standard models may require supplemental heating in freezing temperatures.

• Inverter Technology Air Conditioner

An inverter air conditioner helps reduce electricity costs by adjusting its cooling output to match your home’s exact temperature requirements instead of operating at full power all the time. Instead of repeatedly switching between full power and complete shutdown, the compressor automatically varies its speed to deliver only the cooling your home requires. This eliminates high startup energy spikes, maintains more stable indoor temperatures, reduces humidity more effectively, and operates much more quietly while consuming less power throughout the day. As a result, inverter air conditioners are particularly cost-effective for homes that require extended daily cooling during the summer months.

• High-Efficiency Air Conditioner

When replacing an older air conditioner, investing in a high-efficiency model can deliver substantial long-term savings on monthly electricity bills. These systems use advanced engineering, multi-stage compressors, and higher SEER ratings to produce more cooling while consuming less energy. Although the initial purchase price is higher, the reduction in operating costs often offsets the investment over time. Many Energy Star-certified models also qualify for federal tax credits and local utility rebates, making them even more cost-effective in the long run.

Which AC Upgrades Can Help You Save More?

The AC upgrades that can help you save more are Smart Thermostat Upgrade, Ceiling Fan Installation, Duct Sealing and Insulation Upgrade, Zoned Cooling System, and Variable-Speed Technology. These AC upgrades work together to reduce unnecessary energy consumption, improve cooling efficiency, and lower long-term electricity costs while maintaining consistent indoor comfort.

5 AC upgrades that can help save more are:

1. Smart Thermostat Upgrade

A smart thermostat upgrade helps reduce AC costs by automatically adjusting your home’s cooling schedule based on occupancy, daily routines, and weather conditions. Instead of relying on manual temperature changes, it lowers cooling when your home is empty and restores comfort before you return. Many models use geofencing technology and learning algorithms to optimize energy use without constant user input. By tracking smartphone locations and local weather forecasts, smart thermostats can pre-cool your home during off-peak hours, reducing AC runtime by 10% to 30% while maintaining comfort.

2. Ceiling Fan Installation

Installing ceiling fans helps lower cooling costs by making your home feel cooler without increasing your air conditioner’s workload. Although ceiling fans do not reduce the actual room temperature, they create a wind-chill effect that makes occupants feel up to four degrees cooler. This improved comfort allows you to increase the thermostat setting while using less electricity. For example, raising your thermostat to around 78°F while using ceiling fans can maintain the same level of comfort and significantly reduce cooling energy consumption.

3. Duct Sealing and Insulation Upgrade

Duct sealing and insulation upgrades improve energy savings by ensuring conditioned air reaches your living spaces instead of escaping through hidden leaks. Damaged or poorly insulated ductwork can lose up to 30% of the cooled air moving through your HVAC system, forcing the air conditioner to run longer. Sealing leaks and insulating ducts reduce energy waste while improving airflow efficiency. These upgrades also eliminate pressure imbalances, allowing nearly all of the cooling capacity you pay for to be delivered where it is needed most.

4. Zoned Cooling System

A zoned cooling system reduces electricity costs by directing cooled air only to occupied areas instead of cooling the entire home at once. Using multiple thermostats and motorized dampers, it creates independent temperature zones that can be adjusted separately. This prevents unnecessary cooling in unused bedrooms, guest rooms, or other vacant spaces. Zoned systems are particularly valuable in multi-story homes because they distribute cooling where people are present instead of wasting energy on unoccupied areas.

5. Variable-Speed Technology

Variable-speed technology lowers cooling costs by continuously adjusting compressor performance to match your home’s changing cooling demand. Unlike single-stage systems that repeatedly operate at full capacity, variable-speed compressors run at lower, steadier speeds, eliminating frequent energy-intensive startup cycles. This improves overall efficiency while maintaining more consistent indoor temperatures. Longer, low-speed operation also removes more humidity from the air, allowing you to stay comfortable at a higher thermostat setting while using less electricity.

What Factors Influence How Much You Spend on AC?

The factors that influence how much you spend on AC include AC efficiency and age, home insulation quality, air leaks and ductwork, humidity levels, outdoor temperature, electricity rates and peak hours, low thermostat settings, and frequent on/off cycling. Together, these components determine how hard your air conditioner works, how much electricity it consumes, and the overall cost of keeping your home comfortable throughout the summer.

8 factors that influence how much you spend on AC include:

1. AC Efficiency and Age

The efficiency and age of your air conditioner directly affect how much you spend on cooling because older systems consume more electricity to deliver the same level of comfort. As components wear over time, issues such as a leaking evaporator coil, reduced refrigerant levels, and general mechanical wear can further reduce cooling efficiency, causing the system to run longer and increasing operating costs. For example, an older 10-SEER unit can add $150 to $300 per month to summer electricity bills, whereas a modern 20-SEER system costs around $50 to $100 per month to operate.

2. Home Insulation Quality

Homes with inadequate insulation can increase cooling energy use by 20% to 30%, resulting in approximately $40 to $90 in additional monthly electricity costs. Your home’s insulation directly affects AC costs by reducing or increasing heat transfer. Poor attic and wall insulation allows heat to enter, forcing the air conditioner to run longer, while proper insulation improves cooling efficiency and lowers energy consumption. 

3. Air Leaks and Ductwork

Gaps around windows, doors, and leaking HVAC ducts reduce system efficiency and force your air conditioner to run longer to compensate for lost airflow, increasing AC costs. Air leaks and damaged ductwork increase cooling costs by allowing conditioned air to escape before reaching your living spaces. Leaky ducts can waste up to 30% of conditioned air, increasing monthly cooling costs by $50 to $100 until repaired.

4. Humidity Levels

High humidity increases AC operating costs because your air conditioner must remove both heat and excess moisture from the indoor air. In regions with consistently high humidity, longer AC runtime can increase monthly cooling costs by approximately $30 to $75 compared with homes in drier climates. Moist air feels warmer than dry air, causing the system to run longer before your home feels comfortable. This additional dehumidification increases electricity consumption, particularly in humid climates. 

5. Outdoor Temperature

During periods when outdoor temperatures exceed 95°F, cooling costs can increase by approximately $50 to $150 per month compared with summer conditions. Outdoor temperature directly affects cooling costs because higher temperatures force your air conditioner to run longer and consume more electricity. Extended heatwaves further increase compressor runtime and energy use.

6. Electricity Rates and Peak Hours

Running your AC during peak pricing periods can cost 2 to 3  times more per kilowatt-hour, increasing monthly electricity bills by approximately $40 to $100.Electricity rates affect AC costs because many utility providers charge higher prices during peak demand hours. Cooling during off-peak periods or using a smart thermostat can help reduce energy costs.

7. Low Thermostat Settings

Every degree the thermostat is lowered can increase cooling energy use by approximately 3% to 5%, adding an estimated $20 to $50 to monthly electricity costs. Setting the thermostat too low increases cooling costs by forcing the air conditioner to run longer without cooling the home any faster. Maintaining a moderate temperature improves energy efficiency and reduces system wear.

8. Frequent On/Off Cycling

When you frequently turn your air conditioner on and off, or your system short-cycles due to improper sizing or thermostat placement, cooling costs can increase significantly. Frequent on/off cycling can increase energy consumption by 10% to 15%, adding approximately $20 to $40 to your monthly electricity bill while increasing the risk of costly repairs over time.

When Should You Call an HVAC Professional to Lower Your Energy Bills?

You should call an HVAC professional if your AC runs constantly, your energy bills keep increasing, your home cools unevenly, your air conditioner is more than 10-15 years old, your system needs frequent repairs, or it has not been professionally serviced in over a year. Scheduling a professional AC service can help identify these issues early, improving energy efficiency, lowering operating costs, preventing unexpected breakdowns, and extending the lifespan of your air conditioning system.

Below are the 6  reasons when you should call an HVAC professional to lower your energy bills:

1. Your AC Runs Constantly

Call an HVAC professional if your air conditioner runs continuously without reaching the set temperature. Constant operation often indicates problems such as low refrigerant, restricted airflow, dirty coils, or an undersized system. A professional inspection can identify the root cause, restore efficiency, and reduce unnecessary energy consumption.

2. Your Energy Bills Keep Increasing

Schedule an HVAC inspection when your energy bills continue to rise without a noticeable increase in AC usage. Higher electricity costs often signal declining system efficiency caused by worn components, refrigerant issues, or poor airflow. Addressing these problems early can lower operating costs and improve performance.

3. Your Home Cools Unevenly

Contact an HVAC professional if some rooms remain warmer than others despite the AC running normally. Uneven cooling or an AC that isn’t blowing cold air can result from leaking ducts, blocked vents, poor insulation, low refrigerant levels, or an improperly balanced system. Correcting these issues improves airflow, increases comfort, and prevents unnecessary energy waste.

4. Your AC Is More Than 10-15 Years Old

Contact an experienced HVAC professional if some rooms remain warmer than others despite the AC running normally. Uneven cooling results from leaking ducts, blocked vents, poor insulation, or an improperly balanced system. Correcting these issues improves airflow, increases comfort, and prevents unnecessary energy waste.

5. Your System Needs Frequent Repairs

Consult a qualified HVAC technician if your air conditioner requires frequent repairs to remain operational. Repeated breakdowns, including common signs of a bad AC capacitor such as difficulty starting, frequent shutdowns, or unusual humming noises, often indicate aging components or other mechanical issues that reduce efficiency and increase operating costs. 

6. Your AC Hasn’t Been Serviced in Over a Year

Arrange professional AC maintenance if your system has not been serviced in over a year. Annual inspections help clean critical components, check refrigerant levels, and identify minor problems before they become expensive repairs. Regular maintenance keeps your air conditioner operating efficiently and helps lower long-term energy bills.