Great Ways to Cool Yourself and Your Spaces | CoolingFanReview

Can You Use a Window Air Conditioner inside a Room?

can you use a window air conditioner inside a room

How do you survive summer heat? Without an AC unit, it might be unbearable. Unfortunately, June gloom phenomenon has bitten the dust. Sea breeze benefits only the coastal regions. In August, the weather is impeccable for surfing and beach holiday. Working or living in small spaces is heavy. Can you use a window air conditioner inside a room? Without proper ventilation and air circulation, it becomes hot and stuffy. Your basement and closet might become damp. Car fumes and harmful gases may contaminate your garage air. But your AC unit is to work correctly.

Let’s check which device suits your case. You are to install it properly, avoiding common mistakes and condensate formation.

Why Do Air Conditioners Have to be in a Window?

There are several air conditioning systems in the world. They come in various shapes and sizes. But all these devices use the same technologies to operate. Do you compare car AC systems, portable and central air conditioners? They have something in common. Operation premise is the same.

AC units don’t only let cool air in. They remove humidity and heat from the air. Best mini-split systems make use of the effect of evaporation. Liquid refrigerant or freon inside it evaporates, cooling indoor air. Fan together with condenser coil releases the heat outdoors.

See interesting information about best mini-split systems!
Thus, natural ventilation is a must. In California, ventilation openings are essential even in attics. Natural airflow is beneficial. Therefore, window AC units are still popular. These useful devices are:

  • compact;
  • lightweight;
  • affordable;
  • easy-to-install;
  • energy-efficient.

See Right Now Best Window Ac Unit

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Don’t try to install a central HVAC system by yourself. Above all, professional expertise is necessary in this case. It would cost you a fortune and take 1-5 days. Besides, extensive ductwork requires holes drilling. It makes some construction mess and imposes certain room design constraints.

Split AC vs Window AC Which is Best?

In comparison with central air conditioners, every window unit is a real catch. It’s compact, quiet, and easy to maintain. Multi-split AC is another convenient option. Most importantly, both solutions suit small spaces, like bedrooms and kitchens. But similarly, each of them requires the installation and regular maintenance.

Meanwhile, there are some basic differences. They might determine your choice.

ParametersSplit ACWindow AC
Freon Filling pre-charged and adjusted during the installation at the factory
Place to Install close to outdoor unit window
Installation permanent temporary
Cooling Power, BTU 12,000-60,000 5,000-36,000
Noise Level, dB 24-4043-57
Application large rooms, commercial and residential spaces single rooms and small offices
Room Space, sq. ft. 400-1,000 not more than 300-500

Both options filter the air. Each of them comes with multiple settings, such as a timer and remote control. Thus, window air conditioner vent pull lets you select air intake or exhaust mode. You can get a breath of fresh air or remove smoke from your room.

Are There AC Units that Don’t Need a Window?

Consisting of only one, space-saving unit, window AC is easier to mount and service. Do you live in a state with a cold climate? You can remove it for winter. It lets your device avoid damage from frost and elements.

Split systems are commonly more energy-efficient. But if you meet basic requirements, you can save electricity. It lets you cool your separate room at a lower cost. Does your garage or basement have no windows? There are several suitable options, such as:

  1. Portable air conditioners.
  2. Through-the-wall AC units.
  3. Ceiling fans.
  4. Tower and stand devices.

All breathing zones in your house, including corridors and bathrooms, need natural ventilation. If there are no windows in your room, use other openings. Louvers and doors, walls, side, and corner openings help you breathe freely.

Mechanical ventilation units might be necessary: they enable essential air intake and exhaust. Meanwhile, the dining and kitchen areas have to meet strict air filtration requirements.

Can I Put an Air Conditioner in a Room with no Windows?

THE window AC unit takes some space. It occupies an entire frame, reducing amount of sunlight in the room. Its interior may look a bit darker or gloomier. So, you may prefer other options.

Split systems are much more flexible. Their indoor units are compact and attractive by design. They produce much less noise, suiting your private spaces, like bedrooms and nurseries. Additionally, you can install another indoor unit in an adjacent room. One outdoor unit solves all small-house air conditioning tasks.

Do you want to convert your basement into a living space? In might have no windows at all. Why don’t you prefer a through-the-wall AC device? This unit looks totally the same as the window device. It’s only a bit more:

  • space-saving;
  • efficient;
  • durable;
  • powerful;
  • difficult-to-install.

Window and through-the-wall units are similar by dimensions, weight, and capacities. Wall AC devices require permanent installation. You’ll need to cut a pretty large hole in an external wall – air intake and exhaust implement through the sleeve. An airtight seal doesn’t let cool air escape. Thus, through-the-wall conditioners are a bit more efficient and durable.

What Happens if You Don’t Put an Air Conditioner in the Window?

Small rooms with no windows can be cozy and well-ventilated too. Your basement and laundry room might be small and damp. Will you use them together with your attic and garage as storage areas only? They shouldn’t look messy or overwhelmed.

If there are no windows in these spaces, use a portable AC unit. It’s compact, easy to move, and versatile. Items with exhaust tubes are more efficient and easier to maintain. They are fast to install through a window or external wall. Thanks to fresh air intake, these devices are fast and powerful.

Installation Issues

Ventless AC units only recirculate the air within the room. They evaporate moisture to cool the air. So, you’ll have to empty the tank regularly. Can you get carbon monoxide poisoning from a window air conditioner? It might happen in your garage if you leave your car or truck operating. It requires proper ventilation.

Window AC units take outdoor air in. Polluted air is not healthy. Its concentrations in your yard or house won’t be high. Nevertheless, you are to install your window unit properly. It’s virtually the only simple option that requires no professional expertise.

Size your room and check the window in advance. Additionally, try to avoid common installation mistakes.


  1. Advanced units with adjustable mounting brackets.
  2. Top-quality sealing materials.
  3. A location that is not too far from an electrical outlet.
  4. Friendly or professional help.

Does your window unit look compact? It weighs not less than 100 pounds. So, don’t lift it without help. Additionally, AC devices commonly come with 6-feet-long electric cords. Consider it while selecting the unit location.


Window AC units are perfect. They are compact and affordable. You can remove them when you relocate or for a cold winter. It suits rental apartment applications for sure. In a small space with no windows, use a portable device or some fans to circulate the air. It would be not as efficient as multi-split conditioners. But it still lets you get a breath of fresh air during stuffy summer heatwaves.

Charles Walker

Hi, there! It’s Charles. I live in the city with a hot and dry climate, Los Angeles. Do you need some cooling fans too? Get complete information from the website. Don’t forget to check your local Ventilation Code. Perform your house conversions properly and enjoy the coolness.

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