Mitsubishi PAA-AA18NL 18,000 BTU intelli-HEAT Cased Coil Indoor Unit - R454B

Mitsubishi PAA-AA18NL – 18,000 BTU R-454B Cased Coil Indoor Unit

Deliver efficient, year-round comfort with the Mitsubishi PAA-AA18NL, a high-performance cased coil indoor unit designed for use with Mitsubishi intelli-HEAT® systems and compatible gas furnaces. Ideal for residential applications, this versatile indoor unit provides reliable heating and cooling performance with flexible installation options for a variety of HVAC system configurations.

Flexible Furnace-Compatible Design
Engineered to work with most ANSI-certified gas furnaces, the PAA-AA18NL supports Mitsubishi’s intelli-HEAT® technology for intelligent switchover between heat pump and furnace operation. This allows the system to automatically optimize comfort, energy efficiency, and heating performance during colder outdoor conditions.

Efficient, High-Capacity Performance
With a nominal cooling capacity of 18,000 BTU/h and heating capacity of 19,000 BTU/h, this indoor unit delivers dependable airflow and precise temperature control. Rated airflow reaches up to 525 CFM, with maximum airflow up to 812 CFM for strong, even air distribution throughout the home.

Versatile Multi-Position Installation
Designed for flexible installation, the PAA-AA18NL supports both horizontal and vertical orientations, including left, right, upflow, and downflow configurations. Included drain pans simplify installation and make the unit adaptable to a wide range of HVAC layouts and retrofit applications.

Compact, Durable Construction
Built with a durable, high-quality drain pan featuring excellent heat tolerance and low moisture absorption, this indoor unit is engineered for long-lasting reliability. Its compact cabinet measures just 14-1/2″ W × 21-7/16″ D × 27-1/2″ H, making it ideal for tighter installation spaces and residential mechanical rooms.

Smart Control & Connectivity Options
Compatible with Mitsubishi’s Comfort app, wired and wireless controllers, BACnet®/Modbus® interfaces, and third-party thermostat adapters, the PAA-AA18NL supports advanced comfort customization and convenient smart control integration.

Environmentally Friendly Refrigerant
Uses next-generation R-454B refrigerant for improved environmental performance and reduced global warming potential compared to older refrigerants.

Ideal for homeowners seeking a flexible, high-efficiency hybrid heating and cooling solution with intelligent furnace integration, adaptable installation options, and dependable year-round comfort.