When it comes to heating and cooling your home, bad information can lead to higher energy bills, more frequent repairs, and even a shorter lifespan for your system. At Parker and Company Heating and Air, we believe in educating homeowners with real, fact-based knowledge — because the truth is, many HVAC myths are costing people money every month.

Let’s set the record straight and debunk some of the most common AC misconceptions and heating myths out there.

Myth 1: Leaving the AC on all day is more efficient than turning it off

Truth: This is one of the most common and costly myths.

Keeping your AC running all day while you're not home may keep the temperature steady, but it wastes energy. Today’s HVAC systems are designed to cool your home efficiently and quickly when needed.

Tip: Use a programmable thermostat to raise the temperature when you're away and lower it before you get home. It reduces wear and tear and cuts energy costs.

Myth 2: Bigger HVAC systems cool and heat better

Truth: A larger unit isn’t necessarily better — it’s about proper sizing.

An oversized system will cycle on and off more frequently, leading to uneven temperatures, more wear on parts, and poor humidity control.

 Fact: HVAC systems should be sized based on your home's square footage, insulation, and local climate. At Parker and Company, we do professional load calculations to make sure your system fits your home perfectly.

Myth 3: Closing vents in unused rooms saves energy

Truth: This seems logical, but it disrupts airflow and can damage your system.

Your HVAC system is designed to distribute air evenly. Blocking vents increases pressure in the ducts, which can cause leaks and reduce efficiency.

Heating and cooling facts: Keep all vents open and unobstructed to maintain proper system balance. Zoning systems are a better way to control temperatures in different areas.

Myth 4: Maintenance isn’t needed unless something breaks

Truth: Skipping maintenance is like skipping oil changes on your car.

Neglected HVAC systems lose efficiency and are more likely to break down — especially during extreme weather when you need them most.

Tip: Schedule seasonal HVAC maintenance in spring and fall to catch issues early and extend your system’s life. We offer tune-ups right here in Clayton, NC to keep your system running like new.

Myth 5: Cranking the thermostat heats or cools your home faster

Truth: HVAC systems work at a fixed rate.

Setting your thermostat to 50°F won’t cool your home any faster than setting it to 72°F. It just wastes energy or risks overcooling/overheating.

Tip: Set your thermostat to your target temperature and be patient. If your system is slow to respond, it might need a professional check.

Myth 6: Air filters only need to be changed once a year

Truth: Dirty filters are a major cause of system failure.

Depending on your home and lifestyle (pets, allergies, etc.), you may need to change filters every 1–3 months. A clogged filter restricts airflow, reduces efficiency, and strains the system.

Pro Tip: Set a reminder to check your filter monthly. It’s one of the easiest ways to protect your HVAC system.