Description
Overview
The First Company 9-320-446 is a factory-engineered hot water (HW) coil designed as a direct-fit replacement for First Company 18/24HDX series air handlers and fan coil units. Featuring a multi-row MB coil configuration, this hydronic heating coil delivers consistent, efficient heat transfer to meet the demands of commercial and residential HVAC applications.
Key Features
- OEM replacement hot water coil for First Company 18/24HDX series air handlers
- Multi-row MB coil design for enhanced heat transfer performance
- Engineered for seamless drop-in installation — no modifications required
- Durable construction built to withstand continuous hydronic system operation
- Maintains system efficiency and comfort in hydronic heating applications
Application
This coil is purpose-built for use in First Company 18/24HDX horizontal air handler units. It integrates directly with hot water hydronic systems, circulating heated water through the coil to condition supply air. Ideal for light commercial and residential retrofit or replacement projects where maintaining OEM performance standards is essential.
Why Choose the First Company 9-320-446
Using a genuine First Company replacement coil ensures compatibility, proper fit, and consistent thermal performance. The MB multi-row configuration maximizes surface area contact between the hot water circuit and the airstream, resulting in efficient and reliable heating output. Sourcing OEM-matched components reduces installation time and minimizes the risk of performance issues associated with non-compatible aftermarket parts.







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