How to Use a Window AC Inside


How to Use a Window AC Inside

A window air conditioner is a small air-conditioning unit designed to be installed in an open window and draw warm air out of a room. Window units can be used for cooling one or two rooms, typically smaller than 150 square feet. The basic operating principle of the window AC is simple – it draws the warm air from inside your room through cold coils which condense the water vapor in the hot air and then ejects outside the warm moist air into a cooler surrounding environment where it becomes much denser than warmer surrounding air due to its temperature and water content (adiabatic process).

It cools down by releasing heat to surroundings at relatively higher temp & pressure while becoming more humid than the surrounding medium. Today I will discuss how to use a window AC inside, so let us get started.

Step-wise Guide on How to Use a Window AC Inside:

Step 1: Install the AC inside your window.

The first step you need to take in placing a large air conditioner inside your home is to install it. Start by ensuring no other obstructions on the windows (e.g., curtains or blinds) that may stop the AC from fitting properly into your window space without needing to take them out and re-install them again once you have placed your new AC unit over there. Next, you can measure how much extra room you will need around or below your window sash for installing the AC unit so it will fit nicely just within the frame of your window, as well as without having any problems related to its operation like blocking daylight from coming in through any part of your window when the AC is turned off.

Installing Window AC

Step 2: Place the Air Conditioner Inside The Window Sash.

Once you place your window air conditioner inside your home, make sure that it is properly fixed in place so that it will not slide down or fall out of the window frame even if a strong gust of wind or some other bigger weather disturbance occurs outside and pushes against the AC’s casing from outside. Also, make sure to check whether the sides of your new air conditioner are firmly attached to either side of the edges around your inner window sash so no breeze can push or move it outwards through these gaps. You may need to use foam pads, some caulking, and/or screws (depending on your air conditioner model) to keep it securely in place.

Step 3: Wire Up and Install the AC’s, Power Cord.

There is usually no problem with doing this step. Still, if the power cord you have chosen isn’t long enough for extending all the way from your AC’s outlet plug to the electrical power socket close by inside your home or office that falls within your window’s range of extension, then you will need to buy a new longer one (as well as an extension cord), because cutting off part of any ordinary household power cord and splicing it onto another wire (a typical practice for extending their length) may result in a shock or fire hazard. Also, make sure that there is a power socket within the window’s range that is close to your new air conditioner and positioned in such a way that when you have, it turned on, no part of its casing or any other part of this AC unit will block out that wall or floor electrical outlet.

Step 4: Fit The Right Size of Window Air Conditioner.

Make sure to pick the right-size air conditioner for your particular window and space requirements, so you do not buy a bigger model than what suits you best, as installing one larger than needed may mean the difference between success and failure in getting effective cooling inside your home or office because it may push against the existing structure surrounding your inner window sash where you had placed it, leading to an uneven surface with gaps where air could escape too easily from these areas, thus not allowing your new AC unit to keep the inside temperature as cool as possible.

Step 5: Clean Up the Window Frame Area and Fix the Outer Casing of the Ac Unit.

Make sure that any dust or dirt on your window frame is cleaned up before you place your new air conditioner inside your home, so it does not get stuck or stop working properly because of some obstruction in its way. At the same time, it runs, and make sure that you seal the sides of this huge window AC unit all around with caulking/sealing plastic sheets if necessary so that no strong winds or weather disturbances outside can push against them to move your AC outwards from your window and away from the opening of this space. Otherwise, a disaster could occur if you are not very careful with these steps because rain or something else might push inwards against them and damage your new air conditioner when it is switched on, resulting in electric shock hazards for everyone inside a room this happens.

Clean Up Window Frame Area

Precautions While Performing How to Use a Window AC Inside

  • Always use a window AC in an open area, never inside a closed room or box.
  • Never leave the window AC unattended while running on batteries, and always keep a wall socket adapter connected (even if it’s not plugged into the outlet).
  • Make sure you’re using fresh batteries and that they’re properly inserted like this: (+) side up to ensure effective cooling.
  • Watch out for pets being too close to the Window Air Conditioner, as they can get burned by touching the condenser unit or could trip overextended power cords while you’re away from home!
  • Keep your kids and any household animals at least 6 feet away from an operating air conditioner or fan unit with extended power cords.
  • Disconnect the power supply and unplug a Window AC before cleaning it! The procedure for cleaning your air conditioner is included in this post.

How to Clean Your Window Air Conditioner

Step 1. Clean the Filter:

The filter may collect large, dark debris over time (which can be difficult to see) that needs to be cleaned. Remove the cover and take out the filter. You’ll have a better view of any larger junk caked onto it once you pull it out completely. Use your vacuum or a hose and nozzle to remove any matter stuck in the grillwork located underneath the unit inside your home. Dry thoroughly using a lint-free cloth before putting it back in place.

Cleaning Air Filter Of AC

Step 2. Wipe Down the Grill and Exterior:

If you notice visible dirt or grime, use lukewarm water and a cloth to wipe it down. Avoid using chemicals or abrasive cleaners on the air conditioning unit to cause discoloration of the plastic exterior. Instead, rinse with clear water and allow it to dry completely before replacing the cover.

Step 3. Dust Off the Fins and Coils:

If you notice dust stuck on the fins or coils of your air conditioning unit, use a cloth to wipe it clean. You mustn’t use water and detergent around this area as it can cause damage.

Step 4. Check for Any Obvious Cracks or Leaks:

You may need to look underneath the window AC, so beware of rugs in place. If so, move them temporarily away before tipping the unit forward. Use your eyes to check that nothing seems amiss, and then check with your hands by gently running your fingers over all parts of the machine. Feel for odd sensations such as grinding or rough bumps, which could indicate something has gone wrong during transport or set-up and needs attention from a professional.

Step 5. Clean Out the Tray and Drain:

If you have a window air conditioner with a water collection tray underneath, it’s important toregularly clean ity. A layer of dust and debris can build up in here from the moisture of the evaporating cooling water that sits in the tray until drain holes allow it to run down through your home plumbing system.

Step 6. Reassemble and Spray Cleaner on Your Unit:

When you’re ready to reassemble the air conditioning unit, turn on and test it for a few minutes before plugging back in. You must allow the exterior to dry completely before covering up or putting a/c furniture around it. Otherwise, moisture can build up underneath and cause damage. If you use any homemade cleaning spray, leave this to evaporate off completely rather than apply liberally not to add additional moisture.

If your window AC causes low cooling performance or strange smells and noises coming from the machine, contact an expert technician who can fix indoor ac units for more information and advice on ductless mini-split installation.


The above list was a summary of what you need to know about using an AC unit within the confines of your own home or office so that it can be placed on a window sill or outside wall without much trouble.

This should help you get things done quickly by providing everything you need to do before purchasing or installing one such unit at home/office as long as they are used correctly (and carefully). I hope you have obtained a clear conception of how to use a window AC inside. Thank you and have a nice day!

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