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AC Exhaust: Is It Better Open Or Closed?

AC Exhaust: Is It Better Open Or Closed?

There is a tiny black lever beneath the panel that can be used to open or close a vent on window-style air conditioners. Which it preferable, leaving the exhaust closed or opening it? We have done study on the factors you ought to consider and which may be most effective for you.

In general, better insulation and energy efficiency occur from sealing the vent. Since the vent is made to let in some outside air to lessen staleness, you can open it briefly each night to prevent excessive humidity and heat from leaking in.

One way to control the temperature in your room is to know when to keep the exhaust open or closed. Everything is based on your priorities, location, and interests.

Why Would You Need An Exhaust For An Air Conditioner?

AC Exhaust: Is It Better Open Or Closed?

Air vents prevent stale air in addition to regulating air pressure. When the vents are opened, cooled air is pumped in and used air is pushed out. Since the air’s return channel continuously adjusts the air pressure to the ideal level, you can breathe in the fresh air.

In addition to the filter, air conditioner exhausts also remove any impurities that may have accumulated inside the space. Enclosed spaces are more likely to collect dirt, therefore you should open the vents to let the contaminated air outdoors.

For a brief while, this is better for you, your indoor plants, your pets, and even just you.

How To Prevent Clogging Of Air Conditioner Vents

Because the air conditioner in your house serves as essentially its lungs, having it clogged with trash may eventually injure it. Your air conditioner should be able to quickly suck in and exhaust air when necessary.

Your air conditioner won’t have enough airflow to warm the liquid lines if the vents are consistently clogged, and the evaporator coils will become frosty. Performance of your unit will be affected, and your home will be inconvenienced.

AC Exhaust: Is It Better Open Or Closed?

Before cleaning the air vents on a window air conditioner, it is necessary to thoroughly clean the entire unit.

  • Remove the filter.
  • Align the cooling fins with a fin comb.
  • Clear the collected dirt and debris from the coils.
  • Turn on the coil cleaner.
  • With a brush, foam the fins and surface.
  • To clean the fan blades, use a wet rag.
  • After cleaning, let the air filters dry naturally.
  • Putting back in and turning on

Exterior Air Vent Cleaning

Once you become aware that the air in your house is becoming increasingly stale, you should clean the outer air vent on some air units.

  • To remove the vents, use a screwdriver.
  • Clean the air ducts.
  • Clean the vents with a soapy water solution and dust them
  • In a big tub, soak the vents for 10 to 15 minutes.
  • Dry the vents with a fan and then towel them off.
  • Reinstall the vents on the appliance, then turn it back on.

Does Vent Opening Use More Energy?

Your utility expenses shouldn’t be significantly affected by opening the air conditioner exhaust for a few minutes to an hour.

But after two hours, you shouldn’t keep it open because your compressor will start working harder than necessary. If you think your home might already be too stuffy and could use some fresh air again, you should open it.

How To Refresh Old Air

After utilizing an air conditioned space for a while, you could find that it starts to smell musty. This occurs as a result of the space’s chilly air simply being recycled and circulated.

Since indoor air pollution is exactly as harmful as outside air pollution, breathing in unventilated air might have some negative health effects. It can cause allergies, lungs to deteriorate, and skin to become dry.

Here are some things you may do to get rid of pollutants and unhealthy air in your room.

Deeply Purge Your Space
Simply wiping away the dust isn’t enough to complete a deep clean; you also need to clean every surface where dirt might congregate. That includes your clothing as well as your workstation, cabinets, and mattress.

AC Exhaust: Is It Better Open Or Closed?

This is significant because a lack of sunlight and fresh air may have caused some items in the room to start to smell musty.

Put your clothes outside so they may dry in the sun for a bit. To get rid of mold and mildew, you can also spray them with a vinegar solution made of equal parts water and vinegar (don’t worry, the smell will wear off).

You can settle for a disinfectant spray if you don’t feel comfortable spraying your stuff with this.

Vents And Windows Should Be Opened
By allowing new air to enter, stale air can be eliminated. By opening the AC exhaust, you can improve air circulation and the indoor air quality of your room.

Remember that your vents should be free of debris and obstructions in order for them to replace the air inside efficiently and with minimal energy use.

If you reside in a hot, humid climate, you should be aware that humid air can also enter and may be uncomfortable. Even so, you should still crack them sometimes to bring in some fresh air.

It is better to purchase an air purifier or a humidifier if you have excruciating allergies. You have complete control over your home’s climate in this way.

Replace The Air Filter In Your Air Conditioner
If your appliance is quite old, it could be time to replace the filter entirely. It may still be possible to clean it, but if you brush it vigorously, you risk damaging it.

When the circulating air is faintly powdered with dirt, the air becomes staler. By regularly replacing or cleaning your air filter, you can prolong the freshness of the air.

Additionally, cleaning it will improve the general health of your unit because it stops the compressor from overusing itself and using more energy.

How To Get Rid Of Odors In A Cooled Room

Many of us already get nauseated from stale air, but it is far more difficult to unwind in an environment that smells strongly. Whether it was something you ate that left a pleasant aftertaste in the space or a potted plant that started to rot, you need to get rid of it.

Eliminate The Smell’s Root Cause
Get rid of the offending party first, then turn on your appliances. Discard stale food, tidy up the yard, and get rid of any interior plants that are starting to decay. You’ll find it simpler to circulate the air if you do this.

Activate The Ceiling Fan And The Windows
It’s time to let in some fresh air now that the smell’s source has been removed. Turn on the ceiling fan to speed up the process while opening all the windows to get rid of the unpleasant odor.

Leave Some Coffee Grounds In A Bowl
Coffee grounds assist in eliminating any offensive odors from the air. This is so that the nitrogen they contain can neutralize the air inside. If you don’t have access to a bowl, you can place them in a pair of clean, worn-out socks or stockings to serve as a natural air freshener.

Turn The Dehumidifier On
Excess moisture from recycled air may also be the source of a room’s musty odor. The dehumidifier will absorb the moisture in the air and eliminate the smell as a result.

Since the smell becomes trapped in the damp air, smells are better retained in humid weather. Dehumidifiers rehydrate the indoor air to make way for fresh air, improving the efficiency of air circulation.

Place the dehumidifier at least six inches away from any wall or fixture to guarantee that it operates at its best. Closets and drawers should be opened as well to allow for ventilation and to lessen the musty odor.

Use Aromatic Compounds
The smell of your space will improve dramatically just a few drops of essential oil. In addition, it is stronger and more natural than spray-on air fresheners.

To spread the aroma more evenly and enhance the ambiance of your space, you can use an aroma diffuser. Simply switch on your water-filled diffuser after adding a few drops of essential oil.


If used properly, the air conditioner exhaust offers many advantages. To improve the quality of the air within your home, use other tools that can be used in conjunction with your vents, such as dehumidifiers and air purifiers.

AC Exhaust: Is It Better Open Or Closed?

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Written by HVAC Contributor

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