Heating & Cooling Misunderstandings & Truths
ZAP Knowledge Center
HVAC is full of myths that spread from neighbor to neighbor, old construction habits, or outdated information online.
Many of these misconceptions—like “a bigger system is better” or “closing vents saves money”—can actually harm comfort, raise energy bills, and shorten system life.
This guide breaks down the most common heating and cooling myths we hear in Georgia homes and explains the real facts behind each one, so you can make informed decisions and avoid costly mistakes.
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Not always—leaks can be hidden.
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Not even close.
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Only if programmed properly.
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False. The amount of filters needed per year depends on filter thickness and the replacement frequency required for them.
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Not alone.
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Not guaranteed.
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Not in Georgia.
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No—requires precise installation.
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No—it causes humidity issues.
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No.
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No—leaks must be repaired.
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No.
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Yes—very well.
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No—only what passes through returns.
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Yes.
