Updated at: 02-12-2022 - By: Sienna Lewis

If you take the time to correctly install your window air conditioner, you won’t have to worry about it breaking. A window air conditioner simply needs to be placed in an open window to begin blowing cool air. However, the above 100-pound units need to be supported for safety reasons.

Individuals who are unaware of this supplementary safety feature may be at danger of injury in the event of a fall. In the right hands, a window air conditioner may provide cool air for as long as 25 years. Maintenance includes fixing bugs and answering support questions.

This essay is for you whether you have this issue at home or somewhere else. How to prevent the icy winter wind from entering your flat by sealing the space between the window and the air conditioner will be covered in this article.

If you’re planning on putting in a window air conditioner or are just curious about how to construct a support for one, this article is for you.

Why would window aircon need support?

The air conditioning support is something else you’ll want to know about since you’ve already decided to put it in. By turning on the air conditioning, we can control the relative humidity and keep the space more comfortable. To remove the room’s stifling heat, an air conditioner blasts hot air outdoors. As a result, it’s impossible for an air conditioner to cool the entire space. In an air conditioning unit, half of the unit is always left outside the room. Furthermore, assistance is required for that group.

The air conditioner in the window is designed so that it won’t fall out, but you should still be careful. A window air conditioner support must be installed if the weight of the external unit is greater than 100 pounds.

A/C maintenance is unnecessary if the unit is installed correctly. Getting a mounting bracket is optional but recommended. They’re widely available at hardware stores and online marketplaces. Support for a window air conditioner can be purchased, but if you don’t want to spend the money, you can easily construct one yourself in a short amount of time.

How To Support a Window Air Conditioner – HVAC How To

How to build window aircon support

Period of Time: 45 minutes

The first thing you would want to do is, find the center of gravity of your Ac unit.

One side at a time, carefully raise it. See if it’s hefty on both ends. Once you find that there is an equal amount of force on each side, you can say that the scales are balanced.

Find the sill and mark it.

The AC center mark should be used if the load is evenly distributed. Mark the sill 3 inches toward the heavier side if the AC’s weight is uneven and one side appears to be more lavish than the other. (Here, let’s suppose the right side is heavier.)

Now drill with 5/32” bit and make a 2” deep hole on the area we’ve marked before.

Make sure the block is locked down. Note: If the exterior pane of the window is still solid. We advise a 5/16″ drill for working with cement or masonry. Using that, you can more accurately drill guide holes. Then put a plastic expansion screws to anchor screws down into the still.

Now add around the spacer, then move a block away from stool until the top of the block is even with the seat.

Then drill with two 2” deep holes in sill to each hole, combining the hollow block and round spacer.

Add height with flat spacer.

Next, join the hollow block and the round spacer by drilling two holes, each 2 inches deep, into the sill.

Position the leg footpad against the exterior wall put leg and support together by aligning the holes on the leg’s top.

Put together a long bolt, hex nut, washer, and washer to secure the component to the shelf.

AC-Safe | Nation Wide Products

Here are some simple measures you can take to lock your air conditioner’s window.

Owners of real estate often remove their window AC units before moving out of the building in the winter. In case you were wondering, the AC is unaffected by cold outside, as the first thing you might think of. The unit’s body and the fans’ curls are vulnerable to the cold’s damaging effects.

As winter approaches, you to be worried about your open-air AC that it needs assurance from the external components. The appropriate response is yes.

Support Capacity Of Window AC Brackets (Most Important Factor; Up To 200 lbs)

Your open-air air conditioner may need protection from the elements as winter approaches, causing you concern. Absolutely, that’s the right answer.

The minimum weight requirement for the smallest brackets is 50 pounds. Maximum weight capacity for the largest AC brackets is 200 pounds. The #1 TOP SHELF TSB-2438 (best overall bracket for AC on the market) and the #1 Ivation Bracket both have a weight capacity of 200 lbs, as shown in the chart below.

These days, practically everyone wants to get the sturdiest 200-pound bracket they can find. That’s the safest and, in many ways, the wisest option. Even if you need only a 100 lbs bracket, a 200 lbs bracket wouldn’t be unreasonable.

An example of the best lightweight bracket for AC is the #4 AC Safe AC-080 (you can check it in the table below); it has a support capacity of 80 lbs.

The AC Safe AC-080, which can be found in the chart below, is the greatest lightweight AC bracket and has a support capacity of 80 pounds.

  • The air conditioner’s weight.
  • The distance over which the air conditioner reaches when opened.

The significance of weight is universally recognized. How far out an AC is looking over the window sill is another matter. The key here is to understand that we’re talking about torque; the farther out the air conditioner sticks, the larger the torque on the bracket, and consequentially you will need a stronger bracket to support the AC unit.

Everyone is aware of the significance of maintaining a healthy weight. A separate issue is how far over the sill an AC is looking. The key is to realize that we are talking about torque: the more the air conditioner sticks out, the more torque there is on the bracket, necessitating a more robust bracket.

Window Width And Exterior Wall Thickness (Will AC Support Bracket Fit?)

Every AC support bracket will have the following two geometrical specifications:

  1. Scale of a window’s opening. Your window, for instance, must be between 24 and 38 inches in width.
  2. The thickness of the outside walls. As an illustration, “This mounting bracket can accommodate external walls ranging in thickness from 4″ to 11”.

The dimensions of windows need little explanation. A window support bracket cannot be installed on a window with a width of less than 24 inches. The window cannot accommodate the width of the bracket. When installing an air conditioner in a vertical or casement window, if the width of your window is 20 inches or less, installation can be challenging.

The maximum width for a window is also limited; a standard air conditioning support bracket won’t fit on a pane that’s 40 inches or wider.

The AC support must be mounted on the exterior wall, hence the thickness of the wall is mostly important for drilling purposes. Even though it is no longer necessary, the outside wall thickness is still listed on the specification sheets of newer air conditioners that use no-drill brackets, such as the #3 Ivation Bracket and especially the #1 TOP SHELF TSB-2438.

Make sure you have accurate measurements of the wall and window sizes.

How To Install A Window AC Support Bracket Under Your AC? (Tools? Drills)

The elder generation will recall that extensive drilling is required to mount the AC unit’s bracket. Some people, especially younger people, may lack the skills necessary to operate a drill. Plus, not everyone has access to a drill at home.

That’s why modern brackets like the #1 TOP SHELF TSB-2438 and the #1 Ivation Bracket are known as “window AC bracket no drills.” Consequently, no holes need to be drilled into the wall to accommodate the screws.

These brackets require no drilling and may be installed from within the space. The wings and legs are typically attached after the bracket has been set up, as instructed in the bracket’s user manual.

Installing a window AC support bracket without drilling or using any special equipment should take no more than 10 minutes at most.

The hassle-free, no-drill brackets are a huge time-saver. They are, however, between $70 and $100. For instance, the #1 TOP SHELF TSB-2438 may be purchased for almost $100, in part because it does not require any actual wall drilling in order to install. It’s also constructed from high-quality 18-gauge steel, as we’ll see in the following analysis of TOP SHELF TSB-2438.

Air conditioner support bracket Air Conditioner Parts & Accessories at Lowes.com

Cheaper (often even less than $50), more complicated, and less sturdy are the window AC brackets that necessitate drilling, such as the #2 Jeacent Bracket and #4 AC Safe AC-080.

If you have to depend on screws in the wall to support your AC, you can’t really guarantee these brackets will hold 200 lbs in the air. These cheaper and harder-to-install brackets can support 180 lbs AC weight.

Steps To Build An Air Conditioner Support Bracket

You can’t be sure these brackets will hold 200 pounds in the air if you have to rely on screws in the wall to support your AC. These less expensive and more challenging to install brackets can hold up to 180 pounds of AC weight.

It’s unlikely that these brackets can withstand 200 pounds if they must rely on screws in the wall. These less expensive and more difficult to install brackets can hold up to 180 pounds of AC weight.

That’s for your own benefit, as we want to rule out any potential complications so that you may relax once the job is done. The following are the measures to take when constructing an AC bracket:

Step #1. Locate your air conditioner’s center of gravity

The first step is to locate the object’s center of gravity so that the rest of the procedure can be planned accordingly.

To accomplish this, lift each side up to a certain level individually. Then, flip it over and verify if it’s sturdy on both sides. Once you find that both sides have the same amount of heft to them, you can say that the balance is achieved.

Locate the sill and make a note of its location so you can readily return to it if you ever need it. Take note, if the weight is balanced on both sides, then you can use the center mark, while if not, then put a dot at exactly three inches going to the heavier side.

Step #2. Drilling holes and adding spacer for security

Find the spots that need holes and mark them with a pencil. Then, using a drill, make a hole two inches deep in each specified spot. Keep the block locked at all times. If the window’s exterior is built of cement or brick, we advise using a five by sixteen inches drill.

You’ll then want to put a plastic expansion screw to anchor screws down there into the still. Then move a block away from the stool until the top of the block is aligned with the seat. And add around the spacer afterward.

Then, you can anchor the screws into the still by using a plastic expansion screw. The block is then shifted away from the stool until its top is level with the seat. Second, fill in the area surrounding the separator.

Step #3. Securing the shelf

Now that the bracket’s supports are in their proper positions, you may install the shelf, but you should leave some wiggle room so it can move slightly. Then, line up the holes in the top of the leg with the support’s, and attach the two pieces with the footpad of the leg against the outer wall.

That manner, when it has to be tightened up, it may be done so without any difficulty. After you’ve done everything else, go back and use a screw, nut, and washer to tighten up the places it’s loose. That much, we can promise you.

Frost King Air Conditioner Support Bracket in the Air Conditioner Parts & Accessories department at Lowes.com

That your air conditioner’s support bracket will hold securely and carry your unit without swaying.


An AC bracket constructed in this manner will stand the test of time. It’s not hard to understand, and we promise that the end result will be as good as anything you can get on the market today.

Now that you know the process, hopefully you’ll feel more confident in creating one in the future. Another article for your reading pleasure is provided below.