Want to save on your energy bills this summer? Here’s how you can cut costs without giving up comfort:
- Adjust Your Thermostat: Set it to 78°F when home and 85°F+ when away. Every degree higher saves 3-5% on cooling costs.
- Use Ceiling Fans: Fans let you feel cooler, allowing you to set your thermostat 4-6°F higher, cutting cooling expenses by up to 15%.
- Maintain Your AC: Clean or replace air filters monthly and schedule professional tune-ups to keep your system running efficiently.
- Seal Air Leaks: Close gaps around doors, windows, and ducts to prevent cool air from escaping.
- Block Heat from Windows: Use blinds, curtains, or reflective films to reduce sunlight heat by up to 77%.
- Upgrade to Energy-Efficient AC Units: ENERGY STAR-certified systems can save 10-23% on energy use.
- Reduce Indoor Heat Sources: Switch to LED bulbs and avoid using heat-generating appliances during peak hours.
Quick Tip: Small changes, like raising your thermostat by 1°F, can save you 3-5% on cooling costs. Combine these strategies to cut your energy bills by 20-30% this summer.
7 Ways to Cut AC Energy Bills by 20-30% This Summer
How to save on electric bill with an AC (simple tweaks and maintenance tips)
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Adjust Your Thermostat Settings to Save Energy
Your thermostat plays a major role in managing your cooling expenses. Heating and cooling make up nearly half of the average American household's yearly energy costs - over $900 per year[1][2]. The upside? Adjusting your thermostat settings can significantly lower your AC's workload, helping you save energy without giving up comfort.
Keeping the gap between indoor and outdoor temperatures smaller is key to reducing cooling costs[3]. Every degree you raise your thermostat during the summer eases the strain on your system and saves you money.
Set Your Thermostat to 78°F or Higher
The Department of Energy suggests setting your thermostat to 78°F when you're home and awake. While it might feel a bit warm initially, this temperature strikes a balance between comfort and energy efficiency. Lowering the thermostat below 78°F increases cooling costs by about 3% to 5% per degree[5].
When you're away, set the thermostat between 85°F and 88°F[5]. Adjusting the temperature by 7°F to 10°F for at least eight hours a day can result in up to 10% annual savings on heating and cooling bills[3][4]. Avoid the temptation to set the AC to extreme levels when you return home - your system cools at the same rate regardless of the setting[3][5].
If manually adjusting your thermostat feels like a hassle, automated options can make things easier.
Install a Programmable or Smart Thermostat
Programmable and smart thermostats take the guesswork out of temperature adjustments. These devices can automatically change settings based on your daily routine, ensuring efficient energy use when you're home or away.
Smart thermostats go a step further by connecting to Wi-Fi, allowing you to control your home's temperature remotely. They can learn your schedule to set energy-saving routines and even use geofencing to adjust settings as you leave or approach your house[2].
An ENERGY STAR certified smart thermostat can cut heating and cooling costs by more than 8%[1], saving an average of $50 annually - or up to $100 if your home is often unoccupied[1]. Smart thermostats typically reduce cooling costs by 10% to 15%[5]. With prices ranging from $50 to $300[2], plus rebates of $50 to $100 offered by many local utilities for ENERGY STAR models[2][5], these devices often pay for themselves within a year or two.
Before purchasing, ensure your system supports a C-wire and place the thermostat near your Wi-Fi router to prevent connectivity issues[2].
Use Ceiling Fans to Improve Airflow
Ceiling fans are an affordable way to cut down on your air conditioning costs while keeping your home comfortable. By creating a wind chill effect, fans make you feel cooler without actually lowering the room's temperature [6][7]. When paired with smart thermostat adjustments, they can boost comfort and save energy.
Using ceiling fans correctly allows you to raise your thermostat by 4°F to 6°F without sacrificing comfort. This simple change can lower your summer cooling expenses by as much as 15% [6]. For instance, if you typically set your thermostat to 78°F, you might find 82°F just as comfortable when a fan is running. Here's how to make the most of your ceiling fans.
Set Fans to Rotate Counterclockwise
The direction of your fan blades is crucial in summer. To maximize cooling, make sure the blades rotate counterclockwise when viewed from below. This pushes air downward, creating a breeze that helps evaporate moisture from your skin, making the room feel cooler.
"This direction pushes air downward, creating a cooling breeze that helps evaporate moisture on your skin, making the room feel cooler even if the temperature doesn't change." – Abbi Martin Ice, Senior Director of Brand and Digital Marketing, Hunter Fan Company [6]
You can adjust the fan's direction using its toggle switch or remote control - but remember to do this only when the blades have completely stopped.
How Ceiling Fans Reduce Energy Use
Ceiling fans are incredibly energy-efficient. They circulate air to create a cooling sensation, allowing you to set your thermostat higher without feeling uncomfortable. This adjustment can reduce cooling costs by up to 15% while putting less strain on your air conditioner. Over time, this not only saves money but also helps extend the life of your AC system. Up next, we'll look at how regular AC maintenance can further enhance energy efficiency.
Maintain Your AC Unit Regularly
Keeping your AC unit in top shape isn't just about adjusting the thermostat or ensuring proper airflow - it also requires consistent maintenance. Regular upkeep not only improves efficiency but also helps lower energy bills.
Did you know that HVAC systems make up about 43% of the average home's energy use? A well-maintained AC unit can retain up to 95% of its efficiency, saving you money in the long run [8]. When components like filters and coils get dirty, your system has to work harder to cool your home, which means higher energy costs. By sticking to a maintenance routine, including annual professional check-ups, you can keep your system running smoothly. Here's how to do it.
Replace or Clean Air Filters Every Month
Air filters are a small but crucial part of your AC system. During the summer, it's best to check and replace them monthly [8]. A clogged filter can restrict airflow and even cause the evaporator coil to ice up, which reduces the system's ability to cool your home. Swapping out a dirty filter for a clean one can cut your air conditioner's energy use by 5% to 15% [9][10].
If you have pets, live in a dusty area, or run your AC frequently, you might need to check the filter even more often. Disposable fiberglass filters should be replaced, while reusable ones, like electrostatic or electronic filters, can be cleaned following the manufacturer's instructions. Replacement filters typically cost between $8 and $30, depending on their MERV rating [8].
Schedule Professional AC Tune-Ups
Annual professional tune-ups are essential for keeping your AC in peak condition. During a tune-up, certified technicians handle tasks like measuring airflow, checking refrigerant levels, inspecting electrical connections, and spotting potential issues before they turn into costly repairs [11]. These services usually cost between $80 and $150 and can save you from expensive breakdowns later [8].
For the best results, schedule your tune-up in early spring to get your system ready for summer. Companies like A & Z Mechanical offer these services with certified professionals who ensure your system runs efficiently.
"After evaluating hundreds of residential and light-commercial AC systems, the pattern is consistent: the units that fail early are the ones where coil cleaning and drain line flushing were skipped for multiple seasons." – Indoor Air HQ [8]
Clean the Condenser Coils
Your outdoor condenser unit also needs attention. Over time, dirt, leaves, and other debris can build up on the coils, forming a layer that traps heat and forces your system to work harder. This can increase energy use by 20% to 30% [8].
To keep the condenser coils clean, plan to do it annually, ideally before summer starts. First, turn off the power at the thermostat and outdoor disconnect. Clear at least 2 feet of space around the unit by trimming plants and removing debris [9]. Use a garden hose on low pressure to rinse the coils from the inside out, but avoid using a pressure washer - it can damage the delicate aluminum fins. For tougher grime, apply a coil cleaner or a mix of household detergent and water, let it sit for 5–10 minutes, and rinse thoroughly. Whether you handle it yourself or hire a professional, cleaning costs can range from minimal DIY expenses to moderate service fees [12].
Improve Home Insulation and Seal Air Leaks
In addition to regular AC maintenance, improving your home's insulation and sealing air leaks can significantly cut cooling costs. Even the best AC system will struggle if cool air keeps escaping. Insulation and air sealing work hand-in-hand, easing the load on your cooling system. According to ENERGY STAR, these measures can save you up to 15% on heating and cooling expenses [14].
Did you know that 90% of U.S. homes are under-insulated [14]? ENERGY STAR paints a vivid picture: "If you added up all the leaks, holes, and gaps in a typical home's envelope, it would be the equivalent of having a window open every day of the year!" [14]. Small fixes can make a big difference, so let’s look at some practical ways to seal gaps and improve insulation.
Seal Gaps Around Doors and Windows
Start with your doors and windows. For stationary areas, like cracks between window frames and walls, caulk is your best tool. For moving parts, such as operable windows and doors, weatherstripping is the way to go [13]. The U.S. Department of Energy highlights that "caulking and weatherstripping are two simple and effective air-sealing techniques that offer quick returns on investment, often one year or less" [13].
Take a walk around your home and check for signs of air leaks. Look for dirty spots on insulation, ceiling paint, or carpets - these often indicate problem areas at joints and joists [13]. For doors, consider upgrading to pliable gaskets at the bottom and thresholds. Don’t overlook the little things: install foam gaskets behind outlet and switch plates on exterior walls to block small air pathways [13]. Also, seal gaps where plumbing, ducting, or electrical wiring passes through walls, floors, and ceilings using caulk or low-expansion spray foam [13].
Add Insulation to Attics and Ductwork
Your attic is one of the biggest culprits when it comes to heat gain in the summer. If your attic insulation is level with or below the floor joists, it’s time to add more [15]. Before adding insulation, seal any leaks to get the most out of your efforts [16]. Blown-in insulation works well for attic floors, as it easily fills irregular spaces [16].
Once your attic is insulated, shift your focus to ductwork. If your ducts run through unconditioned areas like attics, wrap them with rigid fibrous or fiber insulation made from fiberglass or mineral wool [15]. For ducts already in the attic, burying them under attic floor insulation can improve efficiency, but ensure they’re properly sealed first [15]. Don’t forget to install insulation baffles (also called rafter vents) to keep soffit vents clear, ensuring proper airflow in the attic [15]. And if you come across vermiculite insulation - a lightweight, gray, flaky material - don’t disturb it. It may contain asbestos and should be tested by a professional lab before any work is done [15].
Reduce Heat Gain Through Windows
Once you've upgraded your home's insulation, it's time to tackle another major source of heat: your windows. Did you know that standard double-pane windows can convert up to 76% of sunlight into heat? [19]. This excess heat makes your AC work overtime, driving up energy bills. But with smart window management, you can cut solar heat gain by as much as 77% [18], leading to noticeable savings.
HVAC expert Alex Atkinson puts it simply:
"I've witnessed this simple process shave large amounts of money from cooling bills in monthly expenses, especially in homes that lack central air" [17].
The approach is simple yet effective: open your windows at night to let in cooler air, and during the day, shut them along with blinds or curtains to lock that cool air inside [17].
Close Blinds and Curtains During Peak Sunlight
One of the easiest ways to block heat is by closing blinds and curtains during the sunniest parts of the day. Reflective blinds, for instance, can cut heat gain by 45% [18]. Even medium-colored drapes with white plastic backings can reduce heat gain by 33% [18].
For the best results, install your window treatments as close to the glass as possible to create a sealed air pocket [18]. If you're using curtains, seal the edges by adding a cornice at the top, securing the sides with Velcro or tape, and overlapping them in the middle [18]. Focus on windows that face direct sunlight - there's no need to close every treatment, just the ones in the sun's path [18].
Install Reflective Window Films or Shades
Reflective window films and specialized shades are excellent tools for keeping your home cooler. Low-emissivity (low-E) films can block up to 70% of solar heat and 99% of harmful UV rays [17]. Insulated cellular shades, also known as honeycomb shades, are another great option, reducing solar heat by up to 60% [19]. These shades trap air in their pockets, creating an insulating barrier between the hot glass and your cooler indoor air [17].
When selecting window films, opt for silver or mirror-like finishes over colored transparent ones, as they do a better job reflecting heat [19]. Pay extra attention to east- and west-facing windows, which receive the most direct sunlight during peak hours [19]. Before applying any DIY film, check your window manufacturer's warranty - some films can damage insulated glass seals [19]. For peace of mind, look for products certified by the Attachments Energy Rating Council (AERC) to ensure energy efficiency [19].
Upgrade to an Energy-Efficient AC Unit
Optimizing thermostat settings and regular maintenance are great steps, but upgrading your AC unit can offer a long-term answer to cutting down on summer cooling costs. If your current system is outdated, consider switching to a modern ENERGY STAR-certified unit. Air conditioning accounts for about 12% of household electricity use in the U.S., with American homeowners collectively spending around $29 billion annually on cooling bills [20]. An inefficient unit not only drives up those costs but also compromises comfort. Here’s why ENERGY STAR-certified systems are worth the investment.
Choose ENERGY STAR-Certified Units
ENERGY STAR-certified air conditioners are designed to use less energy without sacrificing performance. For instance, room air conditioners with this certification consume at least 10% less energy than standard models, with some achieving up to 23% energy savings, depending on the type [21][22]. On average, running an ENERGY STAR-certified room AC costs less than $70 per year [21][22]. Central air systems offer even greater savings - upgrading to an ENERGY STAR model in hot and humid regions like the Southeast can save homeowners $1,853 over the unit’s lifetime compared to less efficient alternatives [23].
These modern units come with advanced features that enhance both efficiency and convenience. Variable speed compressors are a game-changer, as they regulate temperature continuously rather than cycling on and off, ensuring quieter operation and more stable cooling [21][22]. Many models also include smart connectivity, allowing you to control your AC via a smartphone, schedule temperature changes, and monitor energy use remotely [21][22]. Additionally, properly sized units are more effective at dehumidifying your home. Oversized systems may cool the air too quickly without removing enough moisture, leaving your home feeling damp and uncomfortable [21][22].
Get Professional Installation Services
Even the most efficient AC unit won’t perform well if it’s installed incorrectly. For example, a poorly installed room AC can result in air leaks equivalent to a 6-square-inch hole, wasting energy and money [22]. That’s why professional installation is critical. Certified technicians follow ANSI/ACCA guidelines to avoid common issues like leaky ducts or improper refrigerant levels, which can significantly reduce efficiency [23].
A professional installer will also perform a Manual J load calculation to determine the ideal unit size for your home. This involves analyzing factors like your home’s square footage, insulation, window placement, and local climate [24]. Choosing the right size ensures your system operates efficiently from the start. At A & Z Mechanical, certified technicians handle every detail, from verifying your home’s electrical system compatibility to ensuring proper installation, so you can enjoy reliable comfort and energy savings for years to come.
Reduce Heat Sources Inside Your Home
Your air conditioner does more than just cool the heat from outside - it also battles warmth generated inside your home. This extra effort can drive up energy costs. Here are some simple ways to cut down on indoor heat and lighten the load on your AC.
Switch to LED Light Bulbs
Did you know incandescent bulbs release 90% of their energy as heat? [27] That’s a lot of unnecessary warmth! Switching to LED bulbs can make a big difference. They produce minimal heat, use up to 75% less energy, and last between 10,000 and 50,000 hours - all for an average cost of just $3 per bulb [27].
To maximize savings, focus on replacing bulbs in rooms where lights are on for long stretches, like your kitchen, living room, or home office. You can also install LED-compatible dimmers to reduce energy use even further [27].
Use Heat-Generating Appliances During Cooler Hours
Appliances like ovens, dryers, and dishwashers can add extra heat to your home, forcing your AC to work harder. For instance, water heating alone accounts for about 18% of energy use in a typical home [29][30]. To avoid unnecessary heat buildup, consider running these appliances after 6:00 p.m. on days when temperatures exceed 90°F [30].
When cooking, opt for alternatives like microwaves, toaster ovens, or even an outdoor grill to keep your home cooler [31][26]. Washing clothes in cold water and air-drying them can also help reduce indoor heat [30][25]. For dishwashers, wait until they’re full before running them, and choose the air-dry setting instead of heat-dry [29][31]. These small changes not only ease the strain on your AC but can also lower your electricity bill, especially during peak rate hours [26][25].
Run Exhaust Fans in Kitchens and Bathrooms
Exhaust fans are a simple yet effective way to remove heat and humidity. ENERGY STAR–certified models can move 50 to 80 cubic feet of air per minute (CFM), helping to vent unwanted warmth outside [28]. Use them while cooking or showering, but remember to turn them off after about 20 minutes to avoid losing too much cooled air [29][28].
Conclusion
Cutting down on cooling costs this summer doesn’t require drastic changes - just a few smart, consistent adjustments. Simple steps like setting your thermostat to 78°F when you're home, using ceiling fans for that refreshing wind-chill effect, and swapping out air filters every month can prevent efficiency losses of 5–15% [5]. Sealing air leaks, closing blinds during peak sunlight hours, and minimizing the use of heat-producing appliances all help reduce the strain on your AC system [32].
With the average American household spending over $400 on air conditioning between June and September, these strategies can make a noticeable difference [5]. Regular AC maintenance is a key part of the equation - professional tune-ups not only keep your system running efficiently but can also save you hundreds of dollars each year [5].
If you’re looking to keep your home cool and your energy bills low, A & Z Mechanical has you covered. Our certified technicians offer everything from AC tune-ups and duct sealing to energy audits and high-efficiency system installations. Plus, with 24/7 emergency services, we’re here to ensure your system performs when you need it most.
Don’t wait - schedule your service today with A & Z Mechanical and start saving money while staying comfortable all summer long.
FAQs
Will raising my thermostat really save money?
Raising your thermostat is a smart way to save on cooling costs. According to the U.S. Department of Energy, setting your thermostat to about 78°F strikes a balance between energy efficiency and comfort. In fact, adjusting your thermostat up by just 1°F can cut cooling expenses by roughly 6%. However, the savings taper off as the temperature setting gets higher. Keeping your home at a slightly warmer, yet comfortable, temperature can make a noticeable difference in your summer energy bills.
How do I know if my AC is the right size?
To get the best performance from your AC, its capacity needs to match your home's cooling requirements. When an AC is sized correctly, it runs efficiently, avoids wasting energy, and prevents issues like short cycling. According to the Department of Energy, it's a good idea to consult a professional for a load calculation. This calculation considers factors like your home's square footage, insulation quality, and the local climate. Opting for an ENERGY STAR® system can further ensure both proper sizing and energy efficiency.
What home upgrades lower AC bills the most?
Upgrading your home can make a big difference in cutting down those AC bills. Start by swapping out an aging HVAC system for a high-efficiency model - this alone can lead to noticeable savings. Another game-changer? Improving your home's insulation and sealing up any air leaks. These steps help keep cool air inside, reducing the strain on your system.
You can also invest in a smart thermostat. Set it to 78°F when you're home and let it climb to 85–88°F when you're away. This simple adjustment not only keeps your home comfortable but also trims your energy costs significantly.
