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Modine HSB and HC steam unit heaters

Modine HSB/HC Horizontal Steam Hot Water Heaters

Hydronic Unit Heaters | 18,000 – 340,000 BTU

The Modine HSB and HC models are designed with squared-off corners for a clean, smooth appearance. The HSB model features top and bottom steel supply and return connections, while the HC model offers copper tube and coil connections on the side for low-clearance installations.

Both models have a two-piece casing for quick access to the coil, an electric junction box for easy wiring, and fully enclosed motors with thermal overload protection.

Finished with an environmentally friendly, baked-on gray-green powder coat, these units are CSA-listed with CRN-registered heat exchangers for reliability and safety.

Modine HC

Horizontal Delivery Side

Modine HSB

Horizontal Delivery – Top/Bottom Inlet/Outlet

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Modine HSB/HC Series – Horizontal Steam/Hot Water Unit Heater Specifications

The HSB Series offers high-efficiency heating for commercial and industrial spaces, operating on either steam or hot water. These units feature a serpentine copper tube coil design that eliminates internal headers, reducing potential leak paths while maximizing heat transfer.

Model Number Heating Capacity (Steam) View Product
HSB063 63,000 BTU/hr View Model
HSB086 86,000 BTU/hr View Model
HSB108 108,000 BTU/hr View Model
HSB165 165,000 BTU/hr View Model
HSB193 193,000 BTU/hr View Model
HSB258 258,000 BTU/hr View Model
HSB290S01 290,000 BTU/hr View Model
HSB290S06 290,000 BTU/hr View Model
HSB340 340,000 BTU/hr View Model
Heating Capacity Range 18,000 to 340,000 BTU/hr
Heating Medium Steam or Hot Water
Airflow Range 340 to 5,130 CFM
Max Heat Throw / Mounting 46′ Throw | 20′ Mounting Height
Motor Voltages 115V, 208V, 230V, 460V, 575V
Coil Construction Serpentine Copper Tubes with Aluminum Fins

Installation & Application FAQ

What is the advantage of the HSB connection topology?

HSB models feature copper supply and return connections at the top and bottom, allowing for 360-degree rotation to align with existing piping without relocation.

What is the main difference between HSB and HC models?

The difference lies in the connection topology. HSB models feature top- and bottom-mounted connections for 360-degree rotation, while HC units use side-mounted connections to provide a lower vertical profile for restricted ceiling heights.

Can these units be used with both steam and hot water?

Yes. While standard ratings are based on 2 PSI steam, these units are fully compatible with hot water systems and typically deliver 60% to 70% of their steam-rated BTU capacity.

What mounting options are available?

Smaller models (HSB-18 and HSB-24) can be pipe-mounted. Larger models (HSB-33 and up) include tapped holes for threaded rod or pipe suspension to decouple weight from the system piping.

Modine HSB/HC Replacement Parts and Accessories

We stock a comprehensive inventory of components to maintain your HSB units. If the specific part you need is not listed online, please call us to order.

Inventory Updated Daily

Same-day shipping for in-stock items when ordered before noon Central Time.

If you cannot find the specific part you need online, call us today for a custom order.

Contact us for a HSB/HC

Fill out the contact form below. The more information, such as shipping location and model number, the more accurate the quote will be.

Our team will review your request and send you a quote for the requested Modine Heater replacement parts as soon as possible.

Check out our online Modine Part Lookup Guide if you need help identifying your part.

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