Cleanroom HVAC and Air Handling Equipment

Packaged Electric Hot-Water Boiler

A floor-standing electric boiler package that heats closed-loop water for cleanroom AHU coils without combustion, flues or on-site fuel storage.

Flue-Free Electric Heating
Staged Immersion Elements
Compact Stainless Vessel
Integrated Hydronic Safeties

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Product Introduction

The packaged boiler encloses a stainless pressure vessel, replaceable immersion elements, contactors or electronic power control, circulation connections and safety devices in one floor-standing cabinet. Electrical energy is transferred directly into the closed hydronic loop, avoiding combustion air and exhaust infrastructure. Multiple element stages follow heating demand, while a touchscreen displays water temperature, operating state and alarms.

Key Features

Immersion elements transfer heat directly into the water without a combustion heat exchanger or flue loss.

Multiple element stages provide smaller output increments and distribute electrical loading.

A stainless vessel, relief valve, low-water protection and temperature limits form an integrated hydronic package.

Front and rear access panels expose the heater flange, terminals and water connections for service.

Customer Product Concerns

Electric hydronic heating must fit available power, protect the vessel and respond smoothly to a variable coil load.

A facility cannot install gas piping, combustion air or a flue.Immersion heating produces hot water inside a sealed cabinet using only electrical and hydronic connections.

One large contactor stage causes temperature overshoot.Several element stages or proportional power control match output to the changing loop demand.

Low water level exposes heater elements to damaging temperature.Flow and low-water protection disable power before elements can operate dry.

Scale on the element sheath reduces transfer and service life.A removable heater flange exposes the complete bundle for inspection and cleaning.

Typical Applications

Cleanroom AHU heating waterLaboratory reheat systemsHospital ventilation heatingPharmaceutical utility loopsBackup heat for heat-pump plants

Technical Parameters

Representative construction ranges for a commercial packaged electric hot-water boiler are listed below.

Core Material	AISI 304 stainless steel pressure vessel with Incoloy-sheathed electric immersion elements
Panel Thickness	1.2-2.0 mm powder-coated steel cabinet panels
Effective Width	500-1400 mm nominal boiler cabinet width
Maximum Length	Up to 2085 mm overall cabinet depth across packaged boiler capacities
Steel Facing Thickness	1.2-2.0 mm exterior steel sheet
Core Density	Approximately 7900 kg/m³ for the AISI 304 stainless steel pressure vessel
Thermal Conductivity	Approximately 15 W/(m·K) for the AISI 304 stainless steel pressure-vessel material
Surface Finish	Dark-blue polyester powder-coated cabinet with brushed stainless vessel
Joint Type	Bolted cabinet, flanged immersion-heater bundle and threaded or flanged hydronic ports
Customization	Available based on the intended application and operating environment.

Available Options

Staged contactor or proportional SCR controlDifferent vessel volumes and heating capacitiesIntegrated circulation pump and expansion vesselRemote enable, alarm contacts and communications gateway

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