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Cleanroom Equipment Spare Parts
Heating Coil
A shallow finned-tube hot-water coil for restoring sensible preheat or reheat duty in a matched cleanroom air-handling unit.
- One- or Two-Row Heating Core
- Copper Water Circuit
- Low Airside Depth
- Service-Side Threaded Unions
Product Introduction
The heating coil is a compact hydronic heat exchanger installed upstream or downstream of other AHU treatment stages to raise dry-bulb air temperature. Hot water flows through parallel copper tubes mechanically expanded into aluminum plate fins, and a shallow galvanized casing supports the assembly at the air-handler opening. Heating duty commonly requires fewer tube rows than a chilled-water cooling section, reducing core depth and air resistance where the selected entering-water temperature permits. Replacement selection must match the original face dimensions, tube-row count, circuit arrangement, connection orientation and required sensible heating performance.
Key Features
Mechanically expanded copper tubes maintain direct thermal contact with the continuous aluminum fin surface.
A rigid galvanized frame and corner mounting ears provide defined support at the AHU or duct opening.
The accessible copper header groups the hot-water supply and return connections on one service side.
Customer Product Concerns
A replacement heating coil must provide the required sensible capacity without excessive water resistance, air pressure drop or freeze exposure.
A deeper or more densely finned core consumes fan pressure that was not available in the original AHU.Tube rows and fin spacing are selected around the heating load, face velocity and allowable airside resistance.
Incorrect supply and return positions make the existing pipework difficult to reconnect and service.Header side, union orientation, center spacing and thread size are matched to the removed coil or verified equipment drawing.
Poor circuit distribution creates uneven leaving-air temperature across the coil face.Tube passes and header layout are arranged for balanced water flow across the selected face dimensions.
Stagnant water can freeze when cold outdoor air reaches an inactive preheat coil.The coil selection can incorporate suitable circuit velocity, vent and drain provisions, and compatible water-glycol service where required by the operating conditions.
Typical Applications
Cleanroom AHU preheat sectionsSupply-air reheat stagesMake-up air tempering unitsReplacement hot-water coil modules
Technical Parameters
The ranges below describe typical material and envelope choices for compact water-fed air reheating sections.
| Core Material | Seamless copper water tubes mechanically expanded into continuous aluminum plate fins |
|---|---|
| Panel Thickness | 45-180 mm nominal coil depth for common one- or two-row heating selections |
| Effective Width | 300-2200 mm nominal finned face width |
| Maximum Length | Up to 2800 mm overall casing length for common AHU replacement sections |
| Steel Facing Thickness | 1.0-1.6 mm galvanized-steel casing and mounting-ear thickness |
| Core Density | Approximately 8900-8960 kg/m³ for copper tube and header components |
| Thermal Conductivity | Approximately 380-400 W/(m·K) for copper heat-transfer tubes |
| Surface Finish | Natural galvanized-silver casing and aluminum fins with copper header and brass female threaded unions |
| Joint Type | Mechanically expanded tube-to-fin bond with brazed copper circuits and female threaded header connections |
| Customization | Available based on the intended application and operating environment. |
Available Options
One- or two-row constructionCustom face size and fin spacingLeft- or right-hand header arrangementOptional vent, drain and protective fin coating
Planning a Heating Coil specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
