Ruud RHPBYB042AJT000NA M1 Packaged Heat Pump 3.5 Ton

Product Description

The RUUD RHPBYB042AJT000NA is a horizontal-configuration packaged heat pump in the M1 Series, rated at 3.5 nominal tons and 42,000 BTU/h. It operates on R454B refrigerant, an A2L low-GWP refrigerant increasingly specified in new residential and light commercial equipment to meet current environmental regulations. The unit achieves a 13.4 SEER2 efficiency rating under the updated DOE test procedure, meeting modern minimum efficiency requirements. This all-in-one packaged unit houses both the heating and cooling components in a single cabinet, making it a direct-to-structure installation without a separate indoor air handler. Licensed HVAC technicians handle installation and service.

The RHPBYB042AJT000NA is suited for horizontal rooftop or slab applications where vertical clearance is limited or where a horizontal duct connection layout is required. The M1 Series targets residential and light commercial replacement and new-construction projects. Its packaged format simplifies refrigerant circuit commissioning because the system arrives pre-charged, reducing field brazing and leak-check scope compared to split systems. This unit is appropriate for projects where R454B refrigerant handling certification and A2L safety protocols are already in place.

Key Features

• 3.5 nominal tons cooling capacity at 42,000 BTU/h
• 13.4 SEER2 efficiency rating per current DOE test methodology
• Horizontal orientation for rooftop or horizontal duct applications
• Factory-charged with R454B, an A2L low-GWP refrigerant
• All-in-one packaged cabinet eliminates need for separate indoor unit
• M1 Series platform designed for residential and light commercial use

Compatibility

Designed as an OEM packaged heat pump unit within the RUUD M1 Series. Consult RUUD engineering documentation and the equipment submittal sheet to confirm duct, electrical, and structural compatibility for a specific installation before ordering.

Installation Notes

Installation must be performed by a licensed HVAC technician holding the appropriate EPA Section 608 certification for A2L refrigerants, as R454B carries a mild flammability classification requiring adherence to current ASHRAE 15 and local mechanical code requirements. Disconnect and lock out all electrical power to the equipment before any service work. Verify that the mounting structure, curb or slab, meets the unit weight and dimensional requirements per the installation manual prior to setting the cabinet. Do not attempt to field-modify the refrigerant circuit or substitute refrigerant types.

Technical Specifications

• Series: M1
• Cooling Capacity: 42,000 BTU/h
• Nominal Tonnage: 3.5 tons
• Efficiency Rating: 13.4 SEER2
• Orientation: Horizontal
• Refrigerant: R454B

Standard Information

• Brand: RUUD
• Manufacturer Part Number: RHPBYB042AJT000NA