5 HVAC Myths That Are Costing You Money
Heating and cooling account for nearly half of your home's energy use. Unfortunately, most homeowners are running their systems based on advice that's flat-out wrong. Let's debunk the biggest myths.
Myth #1: Cranking the thermostat heats your home faster. Your HVAC system runs at the same speed regardless of the set temperature. Setting it to 90°F won't heat your home faster — it'll just overshoot your target and waste energy.
Myth #2: Closing vents in unused rooms saves energy. Modern HVAC systems are designed for the full duct load of your home. Closing vents creates pressure imbalances that can damage your system and actually increase energy use.
Myth #3: You only need to change your filter once a year. In most homes, filters should be changed every 1–3 months. A clogged filter forces your system to work harder, reducing efficiency and shortening its lifespan.
Myth #4: A bigger system is always better. An oversized HVAC unit short-cycles — it turns on and off too frequently, never running long enough to properly dehumidify your home. Proper sizing is critical.
Myth #5: Ceiling fans cool rooms. Fans cool people, not rooms. If no one's in the room, the fan is just wasting electricity. Turn them off when you leave.
Proper HVAC maintenance can improve efficiency by up to 25% — that's like getting a quarter of your heating and cooling for free.
- Set your thermostat to the actual temperature you want, not higher
- Keep all vents open and unobstructed
- Change filters every 1–3 months depending on pets and air quality
- Schedule annual HVAC tune-ups before peak season
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