First Company 450603R Hydronic Ceiling Mount Air Handler

Product Description

The FIRST COMPANY 450603R is a horizontal, ceiling-mount hydronic air handler designed for chilled water and hot water heating and cooling applications. Rated at 600 CFM, it ships in a right-hand configuration and features a 3-row cooling coil sized for light commercial and residential hydronic systems. The unit operates on 120 VAC single-phase power, draws 1.9 amps, and is driven by a 1/8 HP blower motor spinning at 1,550 RPM. No refrigerant is required. Licensed HVAC technicians and mechanical contractors install this unit as part of a complete hydronic system, typically in ceiling plenum spaces where horizontal orientation conserves headroom.

The 450603R belongs to the HBC Series and is intended for horizontal ceiling-mount installations in buildings served by chilled water or hot water hydronic distribution systems. Its compact footprint — 40.1 inches long, 21.0 inches wide, and 10.0 inches tall — makes it suitable for low-profile ceiling cavities in offices, retail spaces, hotels, and multi-family residential construction. The right-hand configuration determines coil connection and drain pan orientation, so field verification of piping layout is required before ordering.

Key Features

• Hydronic operation — no refrigerant required, compatible with chilled water and hot water systems
• 600 CFM airflow rating with a 3-row cooling coil for effective sensible and latent heat transfer
• Right-hand configuration for specific piping and drain pan orientation
• 1/8 HP, 1,550 RPM blower motor on 120 VAC single-phase, 60 Hz power
• Horizontal ceiling-mount design fits low-profile plenum spaces
• Manufactured in the USA as part of the First Company HBC Series

Compatibility

Designed for use in hydronic heating and cooling systems as part of the First Company HBC Series of horizontal ceiling-mount air handlers. Confirm right-hand configuration matches the piping and drain pan requirements of the installation before ordering.

Installation Notes

Installation should be performed by a licensed HVAC or mechanical contractor familiar with hydronic piping and low-voltage control wiring. Shut off the hydronic supply and return lines and de-energize the circuit at the breaker before making any connections. Follow local mechanical codes and manufacturer piping guidelines for proper supply, return, and condensate drain connections. Verify structural ceiling support is adequate for the unit weight prior to mounting.

Technical Specifications

• Series: HBC Series
• Equipment Type: Hydronic
• Airflow: 600 CFM
• Cooling Coil Rows: 3
• Configuration: Right Hand
• Voltage: 120 VAC
• Amperage: 1.9 amps
• Phase: Single
• Frequency: 60 Hz
• Blower Motor HP: 1/8 HP
• Blower RPM: 1,550 RPM
• Refrigerant: None required
• Length: 40.1 inches
• Width: 21.0 inches
• Height: 10.0 inches
• Weight: 54.0 pounds
• Color: Silver
• Country of Origin: USA

Standard Information

• Brand: FIRST COMPANY
• Manufacturer Part Number: 450603R