Panasonic CS-HM18BAHU INTERIOS 1.5 Ton Multi-Position Air Handler

The Panasonic INTERIOS CS-HM18BAHU is a 1.5-ton multi-position air handler designed for the INTERIOS central heat pump system. It pairs with the CU-M18BAHU outdoor heat pump condenser to provide whole-home ducted heating and cooling using R454B refrigerant.

The air handler supports horizontal and vertical installation, constant airflow operation up to 0.80 in. W.G., multiple control options, and optional auxiliary electric heat kits up to 25 kW. The system is designed for quiet, energy-efficient operation and supports heating operation down to -13°F (-25°C).

Key Features

• 1.5-ton INTERIOS central heat pump air handler
• Compatible outdoor unit: CU-M18BAHU
• 18,000 BTU/h rated cooling capacity
• 18,000 BTU/h rated heating capacity
• 11,200 BTU/h heating capacity at 5°F
• R454B refrigerant system
• ENERGY STAR certified system
• Multi-position installation: horizontal or vertical
• Constant airflow operation up to 0.80 in. W.G.
• Optional auxiliary electric heat kit up to 25 kW
• Adaptive control system
• Aluminum coil construction
• Chassis heater and crankcase heater equipped as standard
• Wired two-way communication controller options
• Built-in Wi-Fi controller option
• Wireless remote controller compatibility
• Third-party 24V thermostat compatibility
• Quiet indoor operation

Performance Specifications

• Model: CS-HM18BAHU
• System Series: INTERIOS Regular Heat Series
• System Type: Central Ducted Heat Pump
• Nominal Capacity: 1.5 Ton
• Rated Cooling Capacity: 18,000 BTU/h
• Cooling Capacity Range: 5,350–20,000 BTU/h
• Rated Heating Capacity at 47°F: 18,000 BTU/h
• Heating Capacity at 17°F: 12,600 BTU/h
• Heating Capacity at 5°F: 11,200 BTU/h
• COP at 5°F: 2.0
• Moisture Removal: 1.71 L/h
• SEER2: 18.8
• EER2: 11.0
• HSPF2 Region IV: 9.1
• COP: 3.15

Indoor Airflow & Noise

• Indoor Airflow: 618.03 / 576.83 / 529.74 / 488.54 CFM
• Indoor Noise Level: 44 / 43 / 41 / 33 dBA
• Constant Airflow Capability: Up to 0.80 in. W.G.

Electrical Specifications

• Indoor Power Supply: 115/208/230V, 1 Phase, 60Hz
• Outdoor Power Supply: 208/230V, 1 Phase, 60Hz
• Indoor MCA: 5.5 A at 115V / 4.0 A at 208/230V
• Indoor MOP: 15 A
• Outdoor MCA: 16 A
• Outdoor MOP: 20 A
• Indoor Fan Motor RLA: 2.0 A
• Indoor Fan Motor Output: 250 W
• Communication Wiring: AWG 20-2

System Power Input

• Cooling Power Input: 1,635 W rated
• Cooling Power Input Range: 400–1,900 W
• Heating Power Input: 1,675 W rated
• Heating Power Input Range: 340–1,650 W

Indoor Unit Specifications

• Dimensions (W × D × H): 21.02 × 17.52 × 45.00 in
• Dimensions (W × D × H): 534 × 445 × 1,143 mm
• Net Weight: 105.82 lb / 48 kg
• Gross Weight: 126.76 lb / 57.5 kg
• Package Dimensions (W × D × H): 26.57 × 20.87 × 48.62 in
• Package Dimensions: 675 × 530 × 1,235 mm

Refrigeration Specifications

• Refrigerant: R454B
• Indoor Throttle Type: Electronic Expansion Valve (EXV)
• Outdoor Throttle Type: Electronic Expansion Valve (EXV)
• Liquid Pipe Size: 3/8 in / 9.52 mm
• Gas Pipe Size: 3/4 in / 19 mm
• Connection Method: Flared
• Maximum Piping Length: 98.4 ft / 30 m
• Maximum Height Difference: 65.6 ft / 20 m
• Maximum Pre-Charged Length: 24.6 ft / 7.5 m
• Additional Refrigerant: 0.7 oz/ft / 65 g/m
• Factory Pre-Charged Refrigerant: 51.15 oz / 1.45 kg

Operating Conditions

• Cooling Operating Range: -13°F to 122°F (-25°C to 50°C)
• Heating Operating Range: -13°F to 75°F (-25°C to 24°C)
• Heating Operation at 5°F: 11,200 BTU/h rated capacity

Compatible Outdoor Unit

• CU-M18BAHU – INTERIOS 1.5 Ton Central Heat Pump Outdoor Unit

Installation & Configuration

• Installation Positions: Horizontal left/right and vertical up/down
• Airflow System: Constant airflow up to 0.80 in. W.G.
• Coil: Aluminum coil
• Insulation: Optional 1-inch R4.2 fiberglass-free insulation
• Auxiliary Heat: Optional heat kit up to 25 kW

Control Options

• Two-way communication wired controller
• Two-way communication wired controller with built-in Wi-Fi
• Wireless remote controller
• Third-party 24V thermostat

Application

The CS-HM18BAHU is designed for whole-home central ducted heating and cooling. When paired with the CU-M18BAHU outdoor condenser, it forms Panasonic's 1.5-ton INTERIOS Regular Heat Central Heat Pump system. The system provides 18,000 BTU/h rated cooling and heating capacity and is designed for operation in outdoor temperatures down to -13°F (-25°C).