Cleanroom HVAC and Air Handling Equipment

Hot-Water Heating Coil

A multi-row copper-tube coil that transfers boiler or heat-pump hot water into cleanroom supply and reheat air streams.

Multi-Row Hydronic Transfer
Low-Temperature Water Ready
Vent and Drain Access
Counterflow Circuiting

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Product Introduction

Hot water passes through copper circuits expanded into aluminum fins, creating a large air-side transfer surface within a flanged casing. Separate supply and return headers distribute flow across the face, and vents at high points remove trapped air. Row count, fin pitch and circuiting can be selected for conventional boiler water or lower-temperature heat-pump loops.

Key Features

Copper tubes and aluminum fins combine high thermal conductivity with widely available service materials.

Counterflow circuiting maintains useful mean temperature difference across multiple rows.

Header vents and low-point drains support filling, air removal and seasonal service.

Fin spacing and protective coatings can be matched to filtration level and cleaning method.

Customer Product Concerns

Hydronic heating coils must deliver the required capacity at available water temperature without excessive water or air pressure drop.

Low-temperature hot water cannot heat through an undersized coil face.Additional rows and optimized circuiting provide more transfer area at a smaller water-air temperature difference.

Trapped air blocks circuits and creates cold sections.High-point automatic or manual vents release air from both supply and return headers.

High water velocity causes erosion and noise.Circuit quantity is selected to keep tube velocity within a stable hydronic range.

Tight fin spacing clogs before scheduled filter maintenance.A suitable fin pitch balances heat-transfer area with cleanability and face pressure drop.

Typical Applications

Cleanroom supply-air heatingHeat-pump hot-water AHUsHospital ventilation heatingPharmaceutical temperature controlLaboratory make-up air

Technical Parameters

Representative material and dimensional ranges for an AHU hot-water coil are listed below.

Core Material	Copper tubes mechanically expanded into aluminum fins with copper headers
Panel Thickness	1.2-2.0 mm galvanized steel casing
Effective Width	300-2600 mm active coil face width
Maximum Length	Up to 3800 mm overall casing length
Steel Facing Thickness	1.2-2.0 mm galvanized or 304 stainless frame
Core Density	Approximately 2730 kg/m³ for the 3003 aluminum fin stock used across the multi-row hot-water coil
Thermal Conductivity	Approximately 193 W/(m·K) for 3003 aluminum hot-water coil fins at room temperature
Surface Finish	Natural or hydrophilic-coated aluminum fins with galvanized casing
Joint Type	Brazed copper tube/header joints with flanged casing and threaded water ports
Customization	Available based on the intended application and operating environment.

Available Options

One to twelve rowsDifferent copper tube diameters and circuitsAluminum, copper or epoxy-coated finsStainless casing, vents, drains and freeze-stat pocket

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