Four Common HVAC Myths That Are Costing You Money

After more than five decades in the HVAC industry and over 100,000 service calls, I’ve heard just about every “tip” and piece of home-remedy advice imaginable. While some are harmless, many common beliefs about heating and cooling can silently drain your wallet, reduce your level of comfort, and put an unnecessary strain on your home’s heating and cooling equipment.

At Empire HVAC, we believe that an educated homeowner is a happy homeowner. To save you from frustration and unexpected breakdowns, I want to bust four of the most persistent myths I still hear today.

Myth #1: Closing Vents in Unused Rooms Saves Energy

This is easily the most common myth I encounter, and it’s one of the most counterproductive. Your HVAC system is designed to heat or cool a specific volume of air, and it relies on a balanced airflow to operate efficiently. When you close vents, you create a pressure imbalance. This forces your system’s blower motor to work harder, using more energy and increasing wear and tear on critical components.

The Right Way: If you want different temperatures in different parts of your home, the solution isn’t to restrict airflow. The best solution is a zoning system, which uses multiple thermostats and automated dampers to deliver customized comfort to each “zone” without putting undue strain on your HVAC unit.

Myth #2: A Bigger HVAC System Is Always Better

In the world of HVAC, bigger is almost never better. An oversized air conditioner or furnace will often “short cycle” (turning on and off rapidly). This constant starting and stopping wastes a tremendous amount of energy, creates uneven temperatures in your home with hot and cold spots, and fails to properly dehumidify your home during our Georgia summers. Furthermore, it puts excessive strain on the system’s components, leading to a shorter lifespan.

The Right Way: The best system is one that is sized just right for your home. Our team of professionals perform detailed load calculations before every installation that will give your unit balance, providing perfect comfort, peak efficiency, and long-term reliability.

Myth #3: You Only Need to Change Your Filter Once a Year

The truth about when to change a filter depends entirely on the type of filter your system uses. While it’s a convenient rule of thumb to change it once a year, following it blindly could damage your system.

• Standard 1” filters (the most common type) need to be changed every 1–3 months.
• Extended surface filters (thicker, high-efficiency media filters) can often last up to a year.

The Right Way: The key is not the calendar, but the condition. A clogged filter restricts airflow, forcing your system to work harder, driving up energy bills, and potentially causing it to overheat or freeze up. Check your filter regularly and change it before it becomes excessively dirty.

Myth #4: All HVAC Companies Are Created Equal

Nothing could be further from the truth. The quality of the installation and service matters just as much as the quality of the equipment itself. The biggest difference between contractors isn’t their trucks or tools; it’s their commitment to training and quality workmanship.

The Right Way: Choose a company that invests in its people. At Empire HVAC, our technicians receive continuous education on new technologies, hold advanced certifications for safety (like A2L refrigerants), and meet weekly to sharpen their technical skills. This investment in our team of professionals means that your system is installed and serviced correctly, safely, and efficiently.

Stay Comfortable, Save Money, and Skip the Myths

The bottom line: understanding the facts about your HVAC system helps you make informed choices that protect both your comfort and your budget. By avoiding common misconceptions, you’ll reduce unnecessary strain on your equipment, improve efficiency, and prevent costly repairs down the road. At Empire HVAC, we believe the best service we can provide is not just fixing systems, but helping homeowners understand how to care for them. If you ever have questions about your system or want to learn more about keeping it running at its best, our team is always here to share knowledge and support you.