How to Install a Window AC Unit Guide


Greetings, readers! Are you looking to cool down your living space during the hot and humid summer months? Installing a window AC unit can be a cost-effective solution. In this article, we will guide you through the 12 simple steps to install a window AC unit. Whether you’re a seasoned DIY enthusiast or a newcomer to home improvement, this guide will help you get the job done. So, let’s get started!

Langkah-Langkah – Step by Step Guide

Step 1: Measure Your Window

Before purchasing a window AC unit, make sure to measure the dimensions of the window. Ensure the unit will fit in the allotted space. Measure the width and height of the window opening to ensure you get the right size unit.

Step 2: Purchase the Right Unit

Select a window AC unit that matches your cooling needs and the size of your room. Refer to the product specifications for the cooling capacity and choose a unit that will effectively cool your space.

Step 3: Gather Your Tools

You will need a number of tools to install your window AC unit, including a screwdriver, measuring tape, level, and saw if your window needs to be modified.

Step 4: Pre-Installation Preparation

Clean your window inside and outside to make sure there’s no debris preventing the window from closing and sealing tightly. Place the mounting brackets supplied with the AC unit onto the window sill. Also, ensure that the electrical outlet for the air conditioner is close enough.

Step 5: Attach the Side Panels

Slide the accordion-style side panels to fit the width of your window. These panels fill the space above the air conditioner and help form a seal between the unit and the window frame. Secure the panels to the window frame using screws.

Step 6: Install the Air Conditioner

Lift the window AC unit and place it on top of the mounting brackets so that the bottom of the unit is against the window sill. Some models require additional screws to be installed into the mounting bracket. Refer to the user manual for specific instructions.

Step 7: Secure the Air Conditioner

The unit should be level to allow proper drainage. Place shims or fillers under the unit if necessary. Secure the unit to the mounting bracket and window sill using screws or other hardware provided.

Step 8: Seal the Window

Close the window down onto the top of the air conditioner unit. Tighten the window sash securely so you form a tight seal. Some units require foam insulation to be between the top flange of the unit and the window sash. This will help to improve the unit’s performance and minimize air leaks.

Step 9: Connect the Electricals

Plug in the air conditioner and connect it to the electrical outlet. Make sure it is set to suit your preferences and turn it on.

Step 10: Finishing Touches

Attach any included accessories. Attach the drainage pipe to the unit and allow it to drain away from your home. Clean up and dispose of any packaging or debris from the installation.

Step 11: Test for Proper Functioning

Turn on the AC to ensure proper functioning of the unit. Check that the air is flowing through the unit and your room is cooling as expected. Listen for any unusual noises, vibrations or leaks.

Step 12: Maintenance and Cleaning

Regular cleaning and maintenance of your window AC unit will extend the life and increase its effectiveness. Clean the filter and wash it thoroughly. Also, condenser coils should be cleaned once a year. Refer to the user manual for specific maintenance procedures.

Tips and Tricks to Keep in Mind

Tip# 1: Do your research

Taking the time to research and compare different options can help you select the best window AC unit for your space and budget.

Tip# 2: Check the power outlet

Ensure you have a suitable power outlet within reach of the window where you’re going to install the AC unit.

Tip# 3: Choose the right location

Select the right window to install the AC unit and avoid the direct sun exposure.

Tip# 4: Check the weatherstripping

If the weatherstripping around your window is worn out, replace it before installing the air conditioner unit. This will help prevent air leaks.

Tip# 5: Keep your unit clean

Regular cleaning and maintenance of your window AC unit will make the unit efficient and help maintain its lifespan.

Tip# 6: Protect your unit from weather

Remove your air conditioning unit when winter comes or build a cover for the external part of the unit. This will protect it from winter weather and help maintain its lifespan.

Tip# 7: Make it energy efficient

Keep your window shades or blinds closed, and limit the use of appliances, like the oven, during the heat of the day to help lower cooling costs.

Tip# 8: Use fan with AC unit

Doing so can help improve energy efficiency while also improving the distribution of cool air throughout the room.

Tip# 9: Do not overuse

Use your AC unit wisely and efficiently. Overusing it to maintain lower temperatures will only add to the electricity bill.

Tip# 10: Keep the unit in good condition

Keep up with regular cleaning and maintenance tasks to ensure the smooth running and extended lifespan of your AC unit.

In conclusion, installing a window AC unit is an easy and cost-effective way to keep your room cool during the summer months. Follow our step-by-step guide and tips and tricks to ensure a hassle-free installation experience. Don’t hesitate and give your room a refreshing cool breeze now!

Advantages and Disadvantages of Installing a Window AC Unit


1. Cost-effective: A window AC unit is often more affordable compared to central air conditioning systems and other cooling options.

2. Easy installation: Installing a window AC unit is generally a quick and easy process. All you need to do is place the unit in the window and plug it in.

3. No ductwork required: Window AC units don’t require any ductwork, making them ideal for apartments or small homes where installing ducts is not possible.

4. Adjustable temperature: You can easily adjust the temperature settings on a window AC unit to your desired level of comfort.

5. Energy efficient: Many modern window AC units are energy-efficient, helping you save on electricity bills.

6. Fits most windows: Window AC units are designed to fit most standard windows, making them a convenient option for many homeowners.

7. Portable: Window AC units are easy to remove and reinstall, making them a great option for renters who want to take their AC unit with them when they move.

8. No outdoor unit: Unlike split AC systems, you don’t need an outdoor unit to operate a window AC unit. This can save space and reduce installation costs.

9. Individual cooling: A window AC unit can cool a single space or room, making it more energy-efficient than central air conditioning systems that cool the entire house.

10. Quiet operation: Window AC units are typically quieter compared to other cooling options like portable AC units or fans.


1. Limited cooling capacity: Window AC units are designed to cool small to medium-sized rooms, making them less suitable for large spaces.

2. Limited range: A window AC unit can only cool the room it is installed in, meaning if you need to cool multiple rooms, you will need to purchase multiple units.

3. Blocks window: Installing a window AC unit can block natural light and prevent airflow through the window.

4. Not aesthetically pleasing: Some homeowners find the appearance of a window AC unit unappealing and prefer other cooling options.

5. Requires physical installation: Installing a window AC unit requires physical effort and may not be suitable for everyone.

6. Security concerns: Installing a window AC unit can compromise the security of your home if it is not installed properly.

7. Noise pollution: While window AC units are generally quieter compared to other cooling options, they can still produce some level of noise.

8. Requires maintenance: Like all cooling systems, window AC units require regular maintenance, including filter replacements and cleaning.

9. Increases energy consumption: While many modern window AC units are energy-efficient, they still use more electricity compared to fans or other natural cooling methods.

10. Not suitable for all climates: Window AC units may not be suitable for very hot or humid climates where central air conditioning systems or other cooling options are more effective.


1. What are the things needed for installing a window AC unit?

You will need a window AC unit, a mounting bracket, screws, a power outlet, and a tool kit.

2. Which is the best type of mounting bracket to use for installation?

A bracket that securely locks onto the window frame is the best to use.

3. Can a window AC unit be installed without a mounting bracket?

No, it is highly recommended to use a mounting bracket for safe and secure installation.

4. What are the safety precautions to take before installation?

Ensure that the power outlet is in excellent condition, and no obstruction blocks the installation path. Wear protective gear such as goggles and gloves.

5. How heavy is a typical window AC unit?

A typical window AC unit weighs between 40-60 pounds.

6. Can one person install a window AC unit?

It is recommended to have two people to install a window AC unit. One person can hold it in place while the other person secures it and ensures that it is leveled.

7. Can a window AC unit be installed in a sliding window?

Yes, a window AC unit can be installed in a sliding window. However, you will need a sliding window bracket kit to facilitate installation in a sliding window.

8. Can a window AC unit be installed in a tilt-out window?

Yes, a window AC unit can be installed in a tilt-out window. Ensure that the mounting bracket straps are adequately fitted to support the weight of the unit.

9. Is it necessary to level a window AC unit?

Yes, it is essential to level a window AC unit to prevent it from vibrating and making noise while in operation.

10. Can a window AC unit be installed in any window size?

No, a window AC unit can only be installed in windows that match its dimensions. Ensure that you measure your window before buying a window AC unit.

11. What are the maintenance practices required for a window AC unit?

You need to clean the air filters regularly and wipe the exterior of the unit with a cloth. You also need to check for any leaks and replace any damaged parts.

12. How long does it take to install a window AC unit?

It usually takes an hour or two to install a window AC unit, depending on the complexity of the installation process.

13. Should I hire a professional to install my window AC unit?

If you are not comfortable installing the unit yourself or you are unsure of the installation process, it is recommended to hire a professional to do it for you.

How to Install Window AC Unit

If you are looking for a way to beat the summer heat, then a window AC unit is a great option. These units are easy to install and can quickly cool down a room. However, if you have never installed a window AC unit before, you might not know where to start. In this article, we will provide you with a step-by-step guide on how to install a window AC unit.


Installing a window AC unit might seem daunting, but it is actually a relatively simple process. All you need is a few basic tools and some patience. By following the steps outlined in this article, you can have your AC unit up and running in no time. Just remember to read the manufacturer’s instructions carefully and to take your time during the installation process. Happy cooling!

If you have any other tips or tricks for installing a window AC unit, feel free to share them in the comments below. And if you have any questions or concerns, don’t hesitate to reach out.


Thank you for taking the time to read this article on how to install a window AC unit. We hope that you found it helpful and informative. Remember, installing an AC unit is a great way to stay cool during the summer months, so don’t let fear hold you back. With a little bit of effort, you can have a cool and comfortable home in no time.

Until next time, stay cool!