Daikin FBA42AAVJU 42K BTU Concealed Duct Air Handler Mini Split Single Zone R32

Product: FBA42AAVJU 

The Daikin FBA42AAVJU is a concealed ducted indoor air handler designed for use in single‑zone ducted or low‑static‑pressure HVAC systems. It delivers quiet, concealed comfort by distributing conditioned air through ducts, making it ideal for spaces where a discreet installation is desired (e.g., offices, retail areas, or residential rooms with ceiling or wall ductwork). The unit uses eco‑friendly R‑32 refrigerant and combines efficient heating and cooling with features like auto‑adjusting airflow, a DC fan motor for quiet operation, and built‑in refrigerant leak detection for improved safety and reliability. It does not include a remote control by default; a compatible remote (often recommended separately) is typically used to operate the system

Specifications: 

Capacity

• Cooling Capacity: 42,000 BTU/h (1.5 tons)

• Heating Capacity: 47,000 BTU/h (approx.)

• Designed for year‑round heating and cooling as part of a matched system with an outdoor unit. 

Refrigerant & Compatibility

• Refrigerant Type: R‑32 (eco‑friendly with improved efficiency)

• Compatible System: Single‑zone mini‑split with a suitable outdoor condenser

• System Type: Ducted indoor unit (concealed installation)

• Ideal for applications needing ducted air distribution rather than wall‑mounted airflow. 

Airflow & Performance

• Auto‑Adjusting Airflow: Automatically adjusts based on static pressure to maintain optimum performance

• DC Fan Motor: Promotes quiet and reliable operation

• Minimal Discharge Air Temperature: Helps prevent duct condensation in cooling mode

• Refrigerant Leak Detection: Built‑in system improves safety and alerts to potential issues (dispersion mode). 

Physical & Sound

• Sound Pressure Level: ~38 dBA in both cooling and heating modes (typical indoor sound level)

• Dimensions (approximate):

  • Width: ~39‑3/8 in

  • Height: ~9‑11/16 in

  • Depth: ~31‑1/2 in

• Weight (Indoor Unit): ~82 lbs (approx.)

• Color / Finish: Typically silver or neutral indoor finish designed for concealed installation. 

Connections

• Liquid Pipe Connection: 3/8 in

• Suction Line Connection: 5/8 in

• Designed to pair with compatible outdoor units that support R‑32 refrigerant and similar capacity rating. 

Controls & Accessories

• Remote Control: Not included; a compatible remote control is recommended for full operation (often model G38‑651 or equivalent).

• Service Access: Designed for service access from below, making maintenance easier.