How Big of an AC Unit Do I Need?

If you are thinking about installing an AC unit in your home, this article is for you. You will find the three main factors that determine how big of an AC unit you need and explain the benefits of each. If you want to know more about how to buy an AC unit, keep reading.

How To Calculate AC Size You Need

There are two methods for determining how big of an air conditioning unit you need in your home. The first method is the Manual J load calculation method, which considers the square footage of each room and its ceiling height to determine what size central air conditioner will work best in your living space.

The second ac sizing tool provides a quick way to estimate how much cooling capacity you'll need in your home. In addition, it helps homeowners understand that when it comes time to buy new HVAC equipment, they can get nearly everything they need from one manufacturer: Goodman.

How Many Sq Feet Does Each AC Cover?

Every AC unit is different, and some units cover more area than others. Some come with a remote control allowing you to change settings without leaving your couch easily. More extensive areas will require larger ac units but be sure to check each one as well; it's not always about size.

One of the most important things to consider when looking for an ac unit is how big a room it will cover. There are different AC units, and each has its set range that tells you at what size that particular unit can cover.

How Other Considerations That Can Influence the Size

What is the climate of your region? Are you in a hot or cold location where an AC unit would help most? A humid summer day can be even more uncomfortable than dry heat. If you are in a region with both, consider looking into two units to keep each area at the desired temperature.

In some regions, you must place your AC unit outside of the window and then control it from inside. In other cases, however, a duct system can send cold air throughout your entire house or just into certain rooms that need cooling down during those hot summer days. If this is what you are planning on doing with your unit, make sure to measure your home to know the correct size.

Windows and Floors

To best decide how big of an AC unit you need, think about where your room is and what floor plan it is on. Then, think about which windows are in that space and any other items such as a fireplace or large furniture that could be in the room.

If your space is on a lower floor, you will likely need an AC unit that can provide more power to compensate for high temperatures outside of the building. This type of cooler typically draws at least 12 amps. It has two or three different speeds or cooling modes, including low cool, medium cool, and fan-only mode, with some larger models having a dehumidifier function.


When talking about AC units, bigger is not always better. You want to find the right size for your home or business so that you can cool it down without using too much energy in the process.

An oversized unit will work harder and use more power than a smaller one would have required – even if it's on its smallest setting. It will not only increase your energy costs, but it can also lead to premature failure of the AC unit itself. So, make sure that you choose an appropriately sized model for your home or business and then enjoy all those extra hours of cooling as summer rolls around.