When we talk about air conditioning, one of the most mentioned terms is BTU, an acronym that generates many questions, but is essential for choosing the right device for each environment. Understanding what it means and how to calculate it correctly can make all the difference in the efficiency and thermal comfort of your home or business.
What is BTU?
BTU stands for British Thermal Unit. It is a measure of energy used to indicate the cooling capacity of an air conditioner. In other words, the higher the number of BTUs, the greater the power of the device to cool (or heat) a given space.
Why is calculating BTU important?
Choosing an air conditioner with an inadequate BTU can cause problems. A device with few BTUs may not cool the environment efficiently, while an oversized device uses more energy than necessary. Therefore, it is essential to make the correct calculation before purchasing.
How to calculate the ideal amount of BTUs
The calculation takes into account several factors:
Room size: multiply the square footage of the room by 600 BTUs.
Number of people: add 600 BTUs for each additional person beyond the first.
Electronic devices: add 600 BTUs for each device that is turned on frequently.
Sun exposure: if the room receives direct sunlight for a long time, add around 800 to 1,000 extra BTUs.
Practical example:
A 12 m² room
With two people
A computer on
Morning sun
Calculation:
12 m² x 600 = 7,200 BTUs
600 (extra person)
600 (electronic equipment)
800 (sun)
Total: 9,200 BTUs
In this case, an air conditioner with 9,000 to 10,000 BTUs would be ideal.
Extra tips for choosing
Rooms with high ceilings, large windows or located in very hot regions may require adjustments in the calculation.
Choose appliances with Procel A Seal, as they consume less energy.
If possible, request a technical evaluation before installation.
Conclusion
Knowing what BTU is and how to correctly calculate the needs of your environment avoids mistakes when choosing the air conditioner. A well-done calculation ensures thermal comfort, energy savings and a longer lifespan of the equipment. Choose wisely and make the most of your investment.
