8 HVAC Myths Debunked: 2025 Update

Learn some easy HVAC maintenance tricks and know when to call in an air conditioning repair service.

Between changing the filter, scheduling routine maintenance, and heating or cooling your home in the most efficient way possible, there’s a ton of info out there on how to best maintain your HVAC system. And with so many varying opinions and sources, it can be hard to separate fact from fiction.

Learn the truth about these common heating and cooling systems myths.

MYTH 1: Turning your AC off when you leave the house is a waste of energy.

Contrary to popular belief, leaving your AC on all day while you're out is like leaving a tap running – wasteful and costly. Your air conditioner should cool your home based on occupancy. Utilizing a programmable thermostat can align your home's temperature with your schedule, providing comfort while conserving energy and cutting costs.

MYTH 2: You only have to change the filter once a year.

Think about this: the air you breathe cycles through that filter. Changing it just once a year isn't enough to maintain air quality or system efficiency. Factors like pets, allergies, and household size mean filters should typically be replaced every 30-90 days. Heed your system's manual or professional advice for specific guidance.

MYTH 3: The bigger the HVAC system the better.

Size matters, but bigger isn't always better. An oversized system cycles on and off more, causing wear and increasing bills without improving comfort. The key is finding a unit that's just right for your space, balancing efficiency and performance, much like choosing a vehicle that fits your family's needs.

MYTH 4: Close the vents in empty rooms to increase energy efficiency.

Modern HVAC systems are balanced networks. Closing vents in unused rooms increases air pressure in the ducts, causing leaks at the vent seams.

MYTH 5: My thermostat’s location doesn’t affect heating and cooling.

Au contraire. Location is crucial. A thermostat near vents, radiators, or in direct sunlight can get false readings, causing your system to over or underperform. Position it in an interior wall and central location, away from direct heat sources for more accurate temperature control and system efficiency.

MYTH 6: I don’t need routine maintenance.

An HVAC system is like a car; it needs regular check-ups to run smoothly. Annual maintenance prevents minor issues from becoming major, ensuring your system's longevity and reliability. Don't wait for a breakdown to appreciate the value of preventative care.

MYTH 7: An energy-efficient unit will automatically reduce my bill.

While an efficient unit is a step in the right direction, your home's insulation and window seals play significant roles. Ensure your home is well-insulated and draft-free to truly reap the benefits of your energy-efficient HVAC system.

MYTH 8: Cover the outdoor unit during winter.

If your HVAC is a heat pump, don’t cover it all because it runs all year. Otherwise, when heavy snowfall is expected, place a board over the fan. Covering the unit seals in moisture and speeds up corrosion.

Energy-Saving Tips:

• Utilize curtains or blinds to block heat during the day.
• Leverage ceiling fans for better air circulation.
• Maintain clean AC filters for efficiency.
• Seal windows and doors to keep the cool air in.
• Regular AC tune-ups ensure peak performance.

Now that you know the facts, you can take better care of your HVAC system, ensuring it keeps you comfortable while being cost-effective and reliable. Making informed choices is key to effective HVAC management. If you ever need system service or if your HVAC unit stops working, schedule repair service with Sears Home Services.