How to Choose the Right-Sized Air Conditioner

How to Choose the Right-Sized Air Conditioner

It's important to buy the right-sized air conditioner to stay comfortable and save energy. A big AC uses too much electricity and makes the air too suffocating while a small one won't cool your home properly. Therefore, choosing the correct size is easy with a little math. Many people in Pakistan want to know what tonnage appliance to buy for their room. Sellers usually suggest the biggest one, but that costs more and raises your energy bill, while a smaller one has to work harder and costs more too. It's essential to understand the BTU requirements for your room. We are here to assist you in finding the perfect air conditioner for your needs. Let's get started!

Room Measurement

To begin, measure the room or area where you plan to install the air conditioner. Use tape to find out how long and wide the room is, and write down these measurements. If the room is not a basic shape, you can divide it into smaller sections like squares and triangles to measure each part separately. Multiply the length, width, and height of the room to calculate the total area in square footage. This calculation will give you an idea of the cooling capacity required for the room.

Cooling Capacity Guidelines

Air conditioners are measured in British Thermal Units (BTUs) or tons. You can follow these basic guidelines to figure out the suitable cooling capacity for your room: 


Room Size (Square Feet)

Recommended BTUs Range

Up to 150

5,000 - 6,000

150 - 250

6,000 - 7,000

250 - 350

7,000 - 8,000

Larger Rooms

Add 1,000 BTUs for every additional 50 square feet


When buying an appliance with the perfect capacity in Pakistan, there are a few extra factors to consider:


Add 0.5 Ton extra if:


  • You live in areas where temperatures in summer often exceed 45 degrees Celsius.
  • Your residence is on the top floor of the building.
  • Your room doesn’t have proper insulation.
  • If multiple people often stay in the room.

For expert assistance, reach out to PEL customer service or visit the PEL website.




Ceiling Height Consideration

It is important to take into account the height of the ceiling when selecting the appropriately sized appliance. Rooms with higher ceilings may require more cooling power due to the larger space that needs to be cooled. On the other hand, rooms with lower ceilings may require less cooling capacity. Considering these factors will help ensure that the air conditioner efficiently cools the entire space, providing maximum comfort and cooling.

Room Insulation

Remember to consider the insulation of the room when selecting an appliance of this kind. Factors such as insulation material, window quality, and door seals can have an impact on overall insulation. Good insulation helps to keep cool air inside, which means you may require a smaller air conditioner. Conversely, poor insulation lets heat in, requiring a bigger unit. Therefore, insulation directly affects cooling efficiency and overall comfort.

Expert Guidance

Seeking expert advice is a wise decision as they take into account factors such as room size, insulation, and climate. This ensures that you select an air conditioner that efficiently and effectively cools your space. Their guidance can help you create a comfortable environment while also saving energy and avoiding unnecessary expenses.

Wrapping Up

It is important to choose the right-sized air conditioner for maximum comfort. Start by measuring your room and considering factors such as the local weather, insulation, and the number of people present. If you're unsure, ask an expert for help. Also, choose an energy-efficient model to save money and help the environment. By following these steps, you can create a cool and cozy space that is perfectly suited to your needs.