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Mechanical / HVACaka: FCUaka: fan coil

Fan Coil Unit

In Plain English

A small unit in each room or zone that conditions air locally by blowing it across hot or cold water coils.

Definition

A self-contained heating and cooling terminal unit consisting of a fan, heating and/or cooling coil, and filter, used to condition a single zone or room. Fan coil units are connected to the building's hydronic piping for hot water and chilled water and are available as horizontal ceiling-mounted, vertical floor-standing, or console types. They allow individual zone control and are common in hotels, offices, and apartment buildings.

Why It Matters in Bidding

Fan coil units are typically high-count, repetitive items in hotels, multifamily, and offices, so a small per-unit pricing error multiplies fast across hundreds of rooms. Estimators must coordinate the FCU takeoff with hydronic piping, condensate, controls, electrical, and access for filter service, because the connections and trim often cost more than the units and drive the mechanical bid total.

Example

On a 200-room hotel, the mechanical estimator counts the ceiling-mounted fan coil units per floor and prices the matching hot- and chilled-water branch piping, condensate drains, thermostats, and electrical drops so the repeated unit assembly is fully captured.

Related Terms

CoilChilled Water SystemAir HandlerHVAC

Frequently Asked Questions

On high-count projects the connections dominate: hot- and chilled-water branch piping, valves, condensate drainage, line voltage, and zone controls per unit. Because the count is large, small omissions in the per-unit assembly compound dramatically. Build a complete repeatable unit price and multiply by an accurate device count from the plans.
Count by type and tag from the mechanical schedule, then group horizontal, vertical, and console units since installation differs. Tie each to its piping runs, condensate path, and electrical. Verify the count against architectural room layouts so model substitutions or missing units in repetitive floors are caught before the bid is submitted.
Fan coils need routine filter and coil maintenance, so ceiling-mounted units require access panels or accessible tile. If the design omits access, change orders follow during construction. Estimators should confirm access provisions are in scope and note whether they are carried by mechanical or by the ceiling and drywall trades.

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