When it comes to HVAC systems, there’s no shortage of advice—and unfortunately, not all of it is accurate. Whether you’re trying to cut energy costs, improve air quality, or extend the life of your system, separating fact from fiction is key. At Hendrix Heating & Air, we’ve heard just about every HVAC myth out there from homeowners in Newport News, Williamsburg, Norfolk, and beyond. Today, we're clearing up some of the most common misconceptions to help you make smarter decisions for your home comfort.
Myth #1: You Only Need to Change the Filter Once a Year
This is one of the most widespread HVAC myths—and one that can cost you in the long run. Filters should typically be changed every 1 to 3 months, depending on your system, lifestyle, and whether you have pets or allergies. A dirty filter restricts airflow, forces your system to work harder, and can even lead to breakdowns. Regular filter changes are one of the easiest and most effective ways to maintain efficiency and indoor air quality.
Myth #2: Closing Vents in Unused Rooms Saves Energy
It might seem logical, but closing vents in unused rooms can actually disrupt your HVAC system’s balance. This can lead to pressure buildup, reduced efficiency, and even duct leaks. Your HVAC system is designed to heat or cool your entire home, and closing off parts of it may cause more harm than good. Instead, consider installing a zoning system or speaking to a professional at Hendrix Heating & Air about energy-efficient upgrades.
Myth #3: Bigger Systems Perform Better
When it comes to HVAC systems, bigger is not always better. An oversized unit may cool or heat your home quickly, but it will cycle on and off more frequently. This short cycling not only wastes energy but also puts unnecessary stress on the system and can reduce indoor air quality. The right-sized system—designed to match your home’s square footage and insulation—is what delivers optimal comfort and efficiency.
Myth #4: Maintenance Isn’t Necessary If Your System is Working Fine
Even if your HVAC system seems to be running smoothly, routine maintenance is essential. Preventive tune-ups help identify issues early, reduce the risk of costly breakdowns, and improve system efficiency. Think of it like getting regular oil changes for your car—it’s an investment that keeps things running longer and more reliably.
Myth #5: The Thermostat Controls How Fast Your Home Gets Hot or Cold
Cranking your thermostat to the highest or lowest setting won’t heat or cool your home faster. Your HVAC system works at a set pace, and extreme settings only cause it to run longer, not more efficiently. Instead, find a comfortable, energy-efficient temperature and let your system do its job gradually and evenly.
Get the Facts—Not the Myths
Don’t let common misconceptions lead to costly mistakes. If you have questions or want to make sure your HVAC system is operating at its best, our team at Hendrix Heating & Air is here to help. Call us today at (757) 982-3729 to schedule a consultation or routine maintenance. Your comfort is our priority—all year long.