Installing an Air Conditioner in the Bedroom? Avoid These 3 Mistakes That Waste Electricity and Harm Your Health

When installing an air conditioner in the bedroom, a small mistake in choosing the placement can cause major regret later on.

Many people focus only on where it’s easy to drill or lay the piping, without considering comfort and safety. As a result, some end up having to remove and reinstall the unit—wasting both time and money.

If you're planning to install an air conditioner in your bedroom, make sure to avoid these 3 critical locations:

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1. Avoid Installing the AC Directly Above the Headboard

Some people install the AC unit directly above the bed, thinking the direct airflow will cool the room faster. But this is actually a dangerous mistake.

• First of all, there’s a real risk that the unit could fall on someone sleeping underneath. There have been cases where poorly installed AC units came loose and dropped onto beds due to careless workmanship—loose screws, lack of anchors, or screws that were too short.

• Second, imagine lying down and suddenly getting dripped on by water from the AC. Wet pillows and blankets are definitely not comfortable. This can happen if the drainage pipe is installed at the wrong angle or coiled too tightly, causing water backup and leakage.

• Third, the noise from the AC—motor sounds, blowing air—right above your head can make it difficult to sleep. Light sleepers may be woken up repeatedly, leading to chronic insomnia over time.

• Lastly, direct cold air blowing on your face and head can disrupt your body’s temperature balance. You might wake up with headaches, nasal congestion, joint pain, facial numbness, or even peripheral nerve paralysis. Even with wind deflectors or shields, airflow control is hard and condensation buildup can cause mold growth.

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2. Avoid Placing the AC Too Close to the Window

To avoid direct airflow over the bed, some people install their AC near a window—but this is another big mistake.

• Window areas often get direct sunlight and are hotter than the rest of the room. Installing the unit here forces it to work harder to regulate the temperature, which consumes more electricity and drives up energy bills.

• Plus, cooling performance drops noticeably. The cold air barely circulates before being neutralized by heat from the glass or leaking out through window gaps. As a result, the AC runs for hours but the room still doesn’t feel cool enough.

• From an aesthetic perspective, putting the AC near the window ruins curtain designs. Some households end up cutting into the ceiling or removing the curtain rod altogether to make space, creating a messy, unappealing look. It may even expose copper pipes and wiring—an eyesore in any room.

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3. Avoid Hiding the AC Inside a Cabinet or Closed Compartment

While not yet widespread, hidden installations are becoming more common in modern apartments to maintain a clean, minimalist look. Some households choose to conceal the AC in a cabinet or recessed wall space, only opening the doors when in use. This may look neat, but comes with serious downsides.

• The most immediate problem is reduced cooling efficiency. Poor air circulation prevents cool air from dispersing, forcing the AC to run at high power non-stop. This not only uses more electricity but also wears out the unit faster—while the room still doesn’t feel cool.

• Moisture and condensation also get trapped inside the enclosed space, leading to serious mold growth. In winter, when heating mode is used, the heat gets trapped and can cause nearby materials to expand, warp, or make creaking noises.

• If these issues arise, your only solution is to remove and reinstall the entire unit—time-consuming, costly, and frustrating.

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Conclusion:
When installing an air conditioner in your bedroom, don’t prioritize convenience over comfort and safety. Avoid these three placement mistakes to ensure better sleep, lower energy bills, and longer AC lifespan.