10 Ways Your HVAC System Can Save You Money on Energy Bills

For homeowners in the Phoenix Valley, opening the electricity bill during the summer months can be a nerve-wracking experience. When the mercury hits 115°F, your air conditioner is essentially running a marathon every single day. It is no surprise that cooling costs make up the largest portion of utility expenses for families in Tempe, Scottsdale, and Mesa.

However, a high energy bill isn’t always inevitable. Many homeowners unknowingly pay more than they need to because their HVAC system is working harder than necessary. Whether it is due to neglected maintenance, outdated habits, or small inefficiencies that add up, there is often room for improvement.

The good news is that your HVAC system can actually be a tool for cost efficiency rather than just a drain on your wallet. By implementing a few strategic changes and staying on top of maintenance, you can significantly reduce costs without sacrificing comfort. Here are 10 practical ways to turn your HVAC system into a money-saving asset.

1. Master Your Thermostat Settings

The thermostat is the brain of your HVAC system, but many people set it and forget it—often at a temperature that wastes money.

Every degree lower you set your thermostat in the summer can increase your energy consumption by a surprising amount. We recommend finding the highest comfortable temperature you can tolerate. For many, 78°F is the sweet spot.

Investing in a smart or programmable thermostat allows you to automate these savings. You can set the system to raise the temperature when you are at work or away for the weekend and cool it back down right before you return. This prevents your unit from cooling an empty house all day.

2. Change Your Air Filters Religiously

We cannot stress this enough: a dirty air filter is the number one enemy of energy savings.

In Arizona, dust is a constant battle. When your filter gets clogged with dust, pet dander, and pollen, it restricts airflow to the blower fan. Your system has to work twice as hard to pull air through that blockage, using more electricity to achieve the same result.

Check your filter every month, especially during the peak cooling season. If it looks gray or fuzzy, swap it out. A clean filter allows your system to “breathe” easily, reducing strain on the motor and lowering your monthly bill.

3. Seal Your Leaky Ductwork

Your air conditioner might be producing plenty of cold air, but is it actually reaching your living room?

In many homes across the Valley, ductwork runs through unconditioned spaces like attics or crawl spaces. Over time, seals can crack, and joints can separate. The Department of Energy estimates that the average home loses 20% to 30% of its conditioned air through duct leaks.

If you are cooling your attic instead of your kitchen, you are throwing money away. Professional duct sealing ensures that every bit of cool air you pay for ends up where you want it.

4. Embrace the Ceiling Fan

Ceiling fans are a desert dweller’s best friend, but they must be used correctly to see cost efficiency.

Fans create a “wind chill” effect that makes a room feel about 4 degrees cooler than it actually is. This allows you to raise your thermostat setting from 74°F to 78°F while maintaining the same level of comfort.

However, remember that fans cool people, not rooms. Leaving a fan running in an empty bedroom just wastes electricity. Turn them off when you leave the room.

5. Keep Your Vents Open and Clear

There is a persistent myth that closing vents in unused rooms saves money. In modern central air systems, this often does more harm than good.

Your system is designed to move a specific volume of air against a specific amount of pressure. Closing vents increases the pressure in the ductwork, which can cause leaks to burst open and force the blower motor to work harder.

Walk through your home and ensure all supply vents are open. Also, check that return vents aren’t blocked by furniture, curtains, or rugs. Good airflow is the key to an efficient system.

6. Schedule Bi-Annual Tune-Ups

You wouldn’t drive your car for 100,000 miles without an oil change, yet many homeowners ignore their AC until it breaks.

Regular HVAC maintenance is essential for keeping efficiency high. During a tune-up, a technician will clean the coils, check refrigerant levels, lubricate moving parts, and tighten electrical connections.

A system with a dirty coil or low refrigerant charge has to run longer cycles to cool your home. By keeping the system tuned up—once in the spring for AC and once in the fall for heating—you ensure it operates at peak performance year-round.

7. Give the Outdoor Unit Breathing Room

Go outside and take a look at your condenser unit. Is it surrounded by overgrown oleanders, piled-up leaves, or stored patio furniture?

The outdoor unit needs to disperse the heat it removed from your house. If airflow around the unit is blocked, that heat gets trapped, causing the compressor to overheat and draw more amps.

Maintain at least two feet of clearance around the entire unit. Periodically hose it down (gently) to remove dust and dirt that accumulates after a haboob or monsoon storm.

8. Block the Sun

Your HVAC system is constantly fighting against the heat gain from the sun beating down on your roof and windows. You can help it win that battle—and save money—by reducing the load.

• Window Treatments: Keep blinds and curtains closed during the hottest parts of the day, especially on south and west-facing windows.
• Solar Screens: Installing sun screens on the exterior of your windows can block up to 90% of the sun’s heat before it hits the glass.

By keeping the heat out in the first place, your AC doesn’t have to turn on as frequently.

9. Check Your Insulation

Insulation acts as a barrier that keeps the cool air inside and the hot attic air outside. In many older homes in Chandler and Gilbert, insulation may have settled or been insufficient from the start.

If your insulation is thin, your AC runs constantly because the cool air is escaping through the ceiling. upgrading your attic insulation is a one-time investment that pays dividends in energy savings every single month for the life of the home.

10. Upgrade to High-Efficiency Equipment

Finally, if your system is over 12 years old, it may simply be too inefficient to ever be “cheap” to run.

Older units often have a SEER rating of 10 or 12. Modern systems start at SEER2 14.3 and go up to 20+. Upgrading to a new, high-efficiency system can reduce your energy usage by 30% to 50% instantly.

Additionally, newer systems often feature variable-speed compressors that run at lower speeds to maintain temperature, rather than blasting at 100% capacity all day. Check our deals and financing page to see if an upgrade fits your budget.

Maximizing Your Savings with Shamrock

Saving money on energy bills is about a combination of smart habits, regular maintenance, and having the right equipment for the job. You don’t have to overhaul your entire home overnight to see a difference. Start with the filter, adjust your thermostat, and ensure your system is clean.

At Shamrock Heating & Cooling, we are dedicated to helping our neighbors in the Phoenix Valley keep their cool without breaking the bank. Whether you need a seasonal tune-up to boost efficiency or are ready to explore the savings of a new system, we are here to provide honest, expert advice.

Call us for professional HVAC solutions tailored to your home.

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