Packaged Units

Exploring Packaged AC Units

How it works? 

A packaged unit AC is a self-contained system that contains all the necessary components within a single outdoor unit. These components typically include the compressor, condenser coil, evaporator coil, air filter, blower fan, and control panel. When the AC is turned on, the compressor pumps refrigerant to the condenser coil, where it releases heat to the outside air. The cooled refrigerant then flows to the evaporator coil, where it absorbs heat from the room's air. The cooled air is then blown back into the room by the blower fan.

Who first invented this unit? 

The first packaged unit AC was invented in 1902 by Willis Carrier, the founder of Carrier Corporation.

Major producers and brands for this unit? 

Some major producers and brands of packaged unit ACs include Carrier, Trane, Lennox, Rheem, York, and Goodman.

Major preventive and corrective maintenance activities done on this unit 

Some major preventive and corrective maintenance activities for packaged unit ACs include cleaning or replacing the air filter, cleaning the condenser and evaporator coils, checking refrigerant levels, inspecting electrical connections and controls, and lubricating moving parts.


The cost of a packaged unit AC can vary widely depending on factors such as brand, capacity, and features. Generally, prices range from a few thousand dollars for a basic unit to tens of thousands of dollars for a high-end model.

Capacities range 

Packaged unit ACs come in a wide range of capacities, typically measured in tons. Capacities can range from around 1 ton for a small residential unit to over 100 tons for a large commercial unit.

Advantages and disadvantages 

Advantages of packaged unit ACs include their compact size, ease of installation, and ability to provide both heating and cooling. Disadvantages include their higher cost compared to split units, the need for professional installation, and the increased noise level due to all components being housed in a single unit.

Where it is used mostly? 

Packaged unit ACs are commonly used in commercial buildings, such as offices, retail stores, and restaurants, where space for multiple outdoor units may be limited. They are also used in residential applications, particularly in areas where heating and cooling needs are high and space for separate indoor and outdoor units is limited.

in MEP
Packaged Units
Administrator January 19, 2024
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