Mitsubishi PAA-CA36NL & PUZ-AK36NL 36,000 BTU 18.1 SEER2 Cased Coil Heat Pump System - R454B

Mitsubishi PAA-CA36NL & PUZ-AK36NL: 36,000 BTU Heat Pump Split System

The Mitsubishi PAA-CA36NL indoor cased coil paired with the PUZ-AK36NL outdoor heat pump delivers efficient year-round heating and cooling for residential and light commercial applications. Designed for compatibility with gas furnaces and hybrid HVAC systems, this 36,000 BTU split system combines Mitsubishi’s advanced inverter technology, intelligent comfort management, and durable construction to provide reliable performance across a wide range of climates.

The PAA-CA36NL indoor unit is engineered for compatibility with most ANSI-certified gas furnaces and supports Mitsubishi intelli-HEAT® technology, enabling intelligent switchover between heat pump and furnace operation when used in hybrid applications. This functionality allows the system to optimize comfort, energy efficiency, and operating costs based on outdoor conditions. The indoor unit features a high-quality drain pan with excellent heat resistance and low moisture absorption for long-term reliability. Flexible multi-position installation supports horizontal left, horizontal right, upflow, and downflow configurations, making the system ideal for both retrofit and new construction projects.

The PUZ-AK36NL outdoor condenser utilizes Mitsubishi’s INVERTER-driven twin rotary compressor technology to precisely match heating and cooling demand. Unlike conventional single-stage systems that repeatedly cycle on and off, inverter technology continuously adjusts compressor speed to maintain more consistent indoor temperatures, improve efficiency, and reduce energy consumption. The system delivers powerful cooling and dependable heat pump performance while maintaining quiet operation and exceptional comfort.

Built for durability in demanding environments, the outdoor unit incorporates Blue Fin anti-corrosion coating and Seacoast Protection to help protect the heat exchanger from salt, sulfur, and airborne contaminants. These protective features help extend equipment life and maintain system performance in coastal regions and harsh outdoor conditions. The system is designed to operate in outdoor cooling temperatures as low as 23°F and as high as 115°F, providing reliable performance throughout the year.

Despite its powerful capacity, the system maintains quiet operation with outdoor sound levels as low as 52 dB(A). Advanced control options support Mitsubishi Comfort app connectivity, kumo station®, BACnet® and Modbus® interfaces, wired and wireless remote controllers, remote sensors, and third-party thermostat integration for flexible comfort management and building automation compatibility.

General Information

System Type: Cased coil indoor unit + single-zone heat pump outdoor unit

Models: Indoor – PAA-CA36NL | Outdoor – PUZ-AK36NL

Capacities: 36,000 BTU Cooling (Max 36,000 | Min 16,200)

Heating Capacity: Heat pump heating operation

Room Size: Ideal for residential and light commercial spaces up to ~1,500–2,000 sq ft

Operating Modes: Heating & Cooling

ENERGY STAR®: Varies by application and configuration

Refrigerant / Factory Charge: R-454B, pre-charged for extended line-set applications

Key Features

INVERTER-Driven Compressor: Precise heating and cooling output for improved efficiency

Twin Rotary Compressor: Smooth, reliable, and quiet operation

intelli-HEAT® Compatibility: Hybrid furnace integration capability

Heat Pump Operation: Year-round heating and cooling from a single system

High Airflow Performance: Up to 1,201 CFM indoor airflow

Blue Fin Coating: Corrosion-resistant outdoor coil protection

Seacoast Protection: Enhanced durability in coastal environments

Quiet Operation: Outdoor sound levels as low as 52 dB(A)

Flexible Installation: Multi-position indoor installation configurations

Smart Controls: Comfort app compatibility, wired/wireless remotes, thermostat and building automation interfaces

Specifications (Rated Conditions)

Cooling Capacity: 36,000 BTU (Max 36,000 | Min 16,200)

Electrical: 208/230 V, 1-Ph, 60 Hz

Indoor Airflow: 800–1,201 CFM

Outdoor Sound: 52 dB(A)

Piping: Liquid 3/8 in | Gas 5/8 in | Max line length: 100 ft | Max height: 100 ft

Outdoor Operating Range: 23°F to 115°F Cooling Ambient

Outdoor Dimensions / Weight: Approximately 41-11/32 × 14 × 52-43/64 in

Indoor Dimensions / Weight: 21-1/8 × 21-7/16 × 32 in | 79.4 lb (cased coil)

Drain Connection: 3/4 in O.D.

Included Components

Indoor Unit: PAA-CA36NL cased coil indoor unit

Outdoor Unit: PUZ-AK36NL inverter-driven heat pump condenser

Ideal For

Homes and light commercial spaces seeking energy-efficient year-round heating and cooling with advanced inverter technology and hybrid furnace compatibility. The Mitsubishi PAA-CA36NL & PUZ-AK36NL system delivers reliable comfort, quiet operation, flexible installation options, corrosion-resistant durability, and efficient heat pump performance for a wide range of applications.