What is a split air conditioner and how to buy the best model at the cheapest price?

A split air conditioner is an air conditioning system that consists of two main units. Simply put, this is the official factory name for the standard, most common air conditioners we use in our homes.

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  • Indoor unit – installed inside the room and contains the evaporator coil, air filter, and fan. It cools the air and distributes it throughout the room.
  • Outdoor unit – located outside the building and contains the compressor, condensing coil, and expansion valve. Its purpose is to remove heat absorbed from the room to the outside.
What is a split air conditioner and how to buy the best model at the cheapest price?

How does a split air conditioner work?

  • The indoor unit absorbs warm air from the room and cools it with refrigerant fluid.
  • The outdoor unit releases heat into the environment.
  • Refrigerant fluid circulates in the system and the compressor regulates the cooling process.

There are several types of split air conditioning systems:

  • Standard split air conditioner – basic cooling.
  • Inverter split air conditioner – energy-efficient, with a variable speed compressor.
  • Multi-unit split air conditioner – several indoor units on one outdoor unit.
  • Cassette air conditioner – ceiling-mounted, for large rooms.
  • Floor-standing air conditioner – powerful cooling for large spaces.

Selecting BTUs for Split System Air Conditioners Based on Room Size

The BTU (British Thermal Unit) of an air conditioner is determined by the size of the room to provide effective cooling. Below is the required number of BTUs based on the square footage of the room:

Room area (m2) Recommended BTU
10-15 5000-7000
15-20 7000-9000
20-28 9000-12000
28-35 12000-14000
35-45 14000-18000
45-55 18000-22000
55-65 22000-24000
65-80 24000-3000
80-100 30000-36000

Important factors that affect BTU:

  • Ceiling height - If the ceiling is high (over 3 meters), a more powerful air conditioner may be required.
  • Number of windows - Large or sun-facing windows increase cooling requirements.
  • Number of people - If 2+ people are constantly in the room, additional BTU is needed.
  • Electrical appliances - computers, televisions, and other appliances emit heat and increase the demand for cooling.
  • Insulation - Good insulation reduces BTU requirements.

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