Horizontal Hydronic Unit Heater

• Horizontal airflow orientation for effective long-reach heat delivery
• Flexible piping configurations: top/bottom (HSB) or side-inlet/outlet (HC)
• 360° rotation capability without the need for piping changes, simplifying installation
• Serpentine copper-tube coil design provides high thermal-shock resistance
• Two-piece casing for easy access to the coil
• Lightweight construction with user-friendly mounting and suspension options
• Elimination of coil headers reduces the risk of leaks and increases coil face area without enlarging the unit
• Coil designed for higher water carrying capacity with reduced friction loss
• Proudly Designed, Engineered, and Assembled in the USA

Factory-Configured Options

• Available Models:
  • HSB: Top and Bottom Inlet and Outlet Connections
  • HC: Side Inlet and Outlet Connections
• Model Sizes (MBH Inputs)
  • 18, 24, 33, 47, 63, 86, 108, 121, 165, 193, 258, 290, or 340 MBH

• Coil Configurations:
  • Standard Copper tube/aluminum fin coil (opposite-side steel connections for HSB)
  • Standard Copper tube/aluminum fin coil (same-side copper connections for HC)
  • Low Outlet Temperature (for hot water or high-pressure steam applications)

• Power Supply & Motor Type Options:
  • Totally Enclosed Motors (with Built-In Thermal Overload): 115V/1ph or 230V/1ph
  • Totally Enclosed Motors (No Thermal Overload): 208V/3ph, 230/460V/3Ph, or 575V/3ph
  • Explosion-Proof Motors (with Built-In Thermal Overload): 115V/1ph or 230/460V/3ph

• Fan Guard Type
  • Standard or Finger-Proof

• Finger-Proof Fan Guards
  • (Available for sizes 18 to 340; not compatible with explosion-proof motors).

• Step-Down Transformers:
  • For supply voltages other than 115V/60Hz/1ph on units with Power Code 01.

• Vertical Deflector Blades
  • (Available for sizes 18 to 193; standard on sizes 258 to 340).

• Solid State Speed Control:
  • Available for Power Code 01 (sizes 18 to 47 only).

• Pipe Hanger Adapter Kits:
  • Pipe Hanger Adapter Kit (Two Adapters per Kit, for sizes 33–86)
  • Pipe Hanger Adapter Kit (Two Adapters per Kit, for sizes 108–340; requires two kits)

• Field Thermostats & Controls:
  • Line Voltage Stat
  • Thermostat Guard (Clear Plastic, Tumbler Lock with two keys)
  • Thermostat with Auto-Off-Fan Switch
  • Thermostat Guard (Clear Plastic)
  • Explosion-Proof Thermostat
  • Aquastat

The HSB/HC series is designed for long heat throw and uniform heat delivery. Ideal for heating buildings with large open areas and low ceilings, and for counteracting heat loss through exterior walls, especially where windows are present.

Common applications include:

• Warehouses, distribution centers, and service bays
• Facility workrooms, equipment rooms, and corridors
• Light-industrial buildings with existing boiler/hydronic systems