When it comes to heating, cooling, and insulation, homeowners often rely on “common knowledge.” The problem? Much of that so-called wisdom is outdated or flat-out wrong. Believing these myths can lead to higher bills, more breakdowns, and wasted comfort.

At Clifford’s HVAC, we hear these misconceptions all the time from North Alabama homeowners. Let’s set the record straight.

Myth #1: Closing vents in unused rooms saves money.

Truth: Closing vents actually increases pressure inside your ductwork, forcing your system to work harder and potentially causing leaks. The result? Higher bills and uneven comfort. A zoning system is the smarter way to control airflow.

Myth #2: Bigger HVAC systems always perform better.

Truth: Oversized systems cool or heat too quickly and then shut off—called short cycling. This wastes energy, wears out parts, and leaves hot and cold spots. Proper system sizing matters far more than sheer size.

Myth #3: Attic insulation only matters in the winter.

Truth: Insulation is just as important in summer. Without it, 120°F+ attic heat radiates into your living spaces, forcing your AC to run longer and harder. Good insulation protects year-round.

Myth #4: Air filters only need changing once or twice a year.

Truth: In Alabama’s humid, dusty climate, filters should be checked monthly and changed every 1–3 months. Dirty filters restrict airflow, hurt efficiency, and worsen allergy symptoms.

Myth #5: All insulation is basically the same.

Truth: Fiberglass, spray foam, and blown-in cellulose all perform differently. The right material and R-value for Alabama’s climate can drastically impact comfort and energy savings.

Myth #6: HVAC maintenance is optional if the system seems fine.

Truth: Skipping tune-ups is like never changing the oil in your car—it might run, but hidden problems shorten its life and lead to expensive repairs. Seasonal maintenance pays for itself.

Myth #7: Ceiling fans lower the room temperature.

Truth: Fans don’t cool the air—they move it. That airflow makes you feel cooler, letting you raise the thermostat a few degrees without losing comfort.

Myth #8: Insulation lasts forever.

Truth: Insulation can settle, compress, or be damaged by moisture and pests. Regular attic inspections ensure it’s still doing its job.

Myth #9: It’s cheaper to leave your HVAC running all day than to turn it off while at work.

Truth: Running your unit nonstop wastes energy. It’s more efficient to raise the thermostat while you’re away and lower it when you return. Smart thermostats make this easy by adjusting automatically to your schedule.

Don’t Let HVAC Myths Cost You Comfort or Cash

The right information can save you money, extend the life of your HVAC system, and keep your Alabama home comfortable in every season.

Clifford’s HVAC proudly serves Huntsville, Decatur, Athens, Florence, and surrounding communities with expert service and honest advice.

📞 Call us today to schedule maintenance, an attic insulation check, or a system upgrade—and experience the truth about total home comfort.