Apprentice answer

Where do the auxiliary drain pans go under a fan coil unit

2nd YearVAVs, Fan Coils & Equipment ConnectionsCheck first

The auxiliary (secondary) overflow drain pan must be suspended directly beneath the entire footprint of the fan coil unit, extending out at least 2 inches past the unit edges on all sides. This catches any condensation overflow if the primary internal pan line plugs up.

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Plain-English answer

Field checklist

The auxiliary (secondary) overflow drain pan must be suspended directly beneath the entire footprint of the fan coil unit, extending out at least 2 inches past the unit edges on all...

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Hey boss, I’m checking vavs & fan coils: Where do the auxiliary drain pans go under a fan coil unit? I found the likely issue and want to verify the next step before I lock it in. Do you want me to adjust it now or check the drawing/detail first?

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Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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