• 16 parts
  • Checked September 2026

Parts of a Mini Split Air Conditioner

The indoor unit with its front panel lifted, then the outdoor unit cut away.

Parts of a Mini Split Air Conditioner

Name Date

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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Write the name of each numbered part.Answer key

  1. Indoor unit
  2. Front panel
  3. Air filter
  4. Evaporator coil
  5. Indoor fan
  6. Louver
  7. Display
  8. Remote control
  9. Drain hose
  10. Outdoor unit
  11. Outdoor fan
  12. Condenser coil
  13. Compressor
  14. Service valves
  15. Refrigerant pipes
  16. Connecting cable

Drawn for this site on 2026-09-30 from plain geometry. Licence: own work.

Each numbered ring is a button. Use the arrow keys to move between them and Enter to choose. Names are read out in Study, and once a part is answered.

Next step Next: a ducted central air conditioner

All 16 parts on the diagram

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Indoor unit 9

  1. Indoor unit Holds the filters, the evaporator coil and a fan. It blows the cooled air into the room.
  2. Front panel It swings up so the air filters can be taken out.
  3. Air filter It slides out to be cleaned. One of the two is taken out in this drawing.
  4. Evaporator coil Makers' manuals call it the indoor heat exchanger.
  5. Indoor fan This shape is called a cross-flow fan.
  6. Louver It can swing by itself. Some makers call it a flap or a vane.
  7. Display The remote control's signal receiver is also on the unit's front.
  8. Remote control It sends its signal to the receiver on the indoor unit.
  9. Drain hose It runs through the wall with the pipes and drips outdoors.

Outdoor unit 4

  1. Outdoor unit It holds the compressor, the condenser coil and a fan.
  2. Outdoor fan It sits behind a wire grille.
  3. Condenser coil Makers' manuals call it the outdoor heat exchanger.
  4. Compressor Squeezing makes the gas hot. It can then give off its heat outdoors.

Between the units 3

  1. Service valves The larger one is for the gas pipe. The smaller is for the liquid pipe.
  2. Refrigerant pipes One carries liquid, the other gas. Installers call the pair a line set.
  3. Connecting cable Makers also call it the communication cable or interconnecting cable.

How this list was compiled: Every name checked on 2026-09-30, a name kept only where two independent sources use it: Wikipedia, Air conditioning (the mini-split section and the operating principles) and Vapor-compression refrigeration, text only; and five makers' owner's or service manuals for wall-mounted split units, read as full text on archive.org: a Fujitsu wall mounted type (https://archive.org/details/manualsbase-id-3944), a Midea inverter split type (https://archive.org/details/manualzilla-id-7303047), an LG wall mounted inverter type (https://archive.org/details/manualzilla-id-7274632), a Hisense split type (https://archive.org/details/manuallib-id-2591241) and an Air-Con mini split (https://archive.org/details/manualzz-id-1180001). No maker is named on the page. Licence: own work

The drawing: Drawn for this site on 2026-09-30 from plain geometry; a schematic of no maker's unit, nothing traced. Licence: own work

How it works

The parts of a mini split, or parts of a minisplit, come in two halves: an indoor unit on the wall and an outdoor unit, joined by two refrigerant pipes and a cable. Another name is split type air conditioner.

Read the full guide

Indoor half, then outdoor half

Numbers 1 to 9 are indoors: the indoor unit with its front panel lifted, an air filter, the evaporator coil behind it, the fan, the louver, the display, the remote control and the drain hose. Numbers 10 to 16 are outdoors: the outdoor unit and its fan, the condenser coil behind the fan and down one side, the compressor in the cut-away, the service valves, and the refrigerant pipes and connecting cable that run up to the wall.

  • A unit that also heats is a heat pump: the same parts plus a reversing valve, which swaps the jobs of the two coils.
  • Makers' names differ: louver, flap or vane; connecting cable or communication cable; refrigerant pipes or line set.

Questions and answers

What are the parts of a split type air conditioner?

Two units and what joins them. Indoor unit: front panel, air filter, evaporator coil, fan, louver, display and drain hose. Outdoor unit: compressor, condenser coil and fan. Between them: two refrigerant pipes and a connecting cable.

How does a mini split work?

The indoor fan pulls room air through the filter and over the cold evaporator coil. The refrigerant carries the heat through the pipes to the outdoor unit, where the compressor and the condenser coil give it off to the outside air.

Is a mini split the same as a split type aircon?

Yes. The parts of a split type aircon are the ones drawn here: mini split, ductless split and split type aircon all name the wall-mounted kind. The parts of a split AC system with ducts differ indoors; that kind is on the air conditioner page.

Why does a mini split have a drain hose?

Water from the room air condenses on the cold evaporator coil. The drain hose carries that water outdoors.

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