P&IDResources / Symbols / P&ID symbols / Heat exchangersUpdated 29 Oct 2026

Air cooler symbol

Also called Fin fan cooler, Air-cooled heat exchanger

An air cooler cools a process fluid in finned tubes with air blown across them by fans. It saves cooling water.

Air cooler P&ID symbol
Air cooler symbol, as drawn on a P&ID

What the air cooler symbol means

An air cooler cools a process fluid in finned tubes with air blown across them by fans. It saves cooling water.

How it is drawn

A rectangle with a zig-zag tube line inside and a fan, a circle or propeller, above or below.

The air cooler symbol in each standard

US legend (PIP PIC001)

Drawn as on most US-style legend sheets.

ISO 10628-2X2505

Heat exchanger with finned tube and fan. A box with a fan above a finned tube. The finned tube on its own is X8018.

ISO SVG

German (DIN): Luftkühler. See DIN P&ID symbols.

Where you see it on a P&ID

On compressor discharges, overhead condensers and product coolers, especially where water is scarce.

Tag codes

The air cooler is commonly tagged:

  • E
  • AC

Tag formats follow the project numbering procedure. For instruments, the letters follow ISA 5.1, explained on the instrument symbols page.

Frequently asked questions

What does the air cooler symbol look like on a P&ID?

A rectangle with a zig-zag tube line inside and a fan, a circle or propeller, above or below.

What is a air cooler used for?

An air cooler cools a process fluid in finned tubes with air blown across them by fans. It saves cooling water. You will find it on compressor discharges, overhead condensers and product coolers, especially where water is scarce.

What tag does a air cooler have?

It is commonly tagged E, AC. The exact tag format comes from the project numbering procedure and the legend sheets.

Is the air cooler symbol the same in ISA and ISO?

No. A box with a fan above a finned tube. The finned tube on its own is X8018. The ISO 10628-2 registration number is X2505. Always check the legend sheets at the front of the P&ID set.

What is the air cooler called in German?

Luftkühler. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.

Every air cooler on your drawings, found for you.Deskely Extract reads ISA and ISO P&IDs alike, finds each tag with its type, system and subsystem, and hands your engineers a register to check instead of a spreadsheet to type.
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