Replacing an air-conditioner part starts with identifying the job the part must perform. These two new Comfort Aire parts serve different roles: one is an air exhaust duct connector, while the other is a display box subassembly. The key decision is whether your repair concerns the exhaust-duct connection or the display-box assembly.
Quick verdict
Choose the Comfort Aire Connector, Air Exhaust Duct when the replacement need is the round Midea unit adaptor / air-exhaust-duct connection and your model appears among its named applications. Choose the Comfort Aire Display Box Subassy Box when the repair calls for that display-box component and the unit is one of the listed Comfort Aire REG models.
The listed prices are $33.24 apart, reflecting the fact that these are not interchangeable roles. Start with the part function, then narrow by the model names associated with that function.
At-a-glance comparison
| Part | Listed price | Role named in the title | Named model applications |
|---|---|---|---|
| Comfort Aire Air Conditioner Part # 12120600003049 - Connector, Air Exhaust Duct | USD 8.93 | Connector, air exhaust duct | Includes Artic King, Comfort-Aire PS/PSH, Danby, KoolKing, Magic Chef, Midea, Pelonis, and Toshiba models |
| Comfort Aire Air Conditioner Part # 17220300A17150 - Display Box Subassy Box | USD 42.17 | Display Box Subassy Box | Includes Comfort-Aire REG-123, REG-183, and REG-81 model variants |
Where each part wins
Connector, Air Exhaust Duct: for the duct-adaptor job
The Connector, Air Exhaust Duct is the focused pick for an exhaust-duct connection. Its description identifies it as a Midea Unit Adaptor (Round) and names a broad set of specific model families, including Comfort-Aire PS-121B, PSH-141 variants, and PS-121 variants, along with several models from other named brands. That makes it the relevant choice when the repair centers on joining the air exhaust duct through this particular round adaptor format.
Display Box Subassy Box: for named Comfort-Aire REG units
The Display Box Subassy Box wins when the needed component is explicitly the display-box assembly. Its named applications are concentrated on Comfort-Aire REG units, including REG-123L, REG-123M, REG-183J, REG-183M, REG-81L, and REG-81M. This is the more targeted option for that group of Comfort-Aire air conditioners, rather than for a duct-connection repair.
Product notes
Connector, Air Exhaust Duct (Part # 12120600003049)
The Comfort Aire Connector, Air Exhaust Duct is listed at USD 8.93 and is designed around a specific physical task: connecting the air exhaust duct. The round Midea unit adaptor description is especially useful for shoppers replacing that connection point, and the lengthy named application list spans models from Artic King, Comfort-Aire, Danby, KoolKing, Magic Chef, Midea, Pelonis, and Toshiba. Pick this part when the required replacement is the duct connector itself and the model aligns with one of those named applications. Its limitation is equally clear: the stated role is an air-exhaust-duct connector, not a Display Box Subassy Box for the Comfort-Aire REG series.
Display Box Subassy Box (Part # 17220300A17150)
The Comfort Aire Display Box Subassy Box is listed at USD 42.17 and is the dedicated choice for a display-box subassembly replacement. The model list focuses on Comfort-Aire REG air conditioners, covering REG-123, REG-183, and REG-81 variants, including REG-123J and REG-183J-20A. Choose it when the repair calls for the display-box component associated with those named REG models. The limitation is its narrower stated application focus and different function: it is not presented as an air exhaust duct connector or round Midea unit adaptor. Its higher listed price also makes identifying the correct component role particularly important before choosing between the two.
Final choice by use case
- For an air exhaust duct connection: choose the Connector, Air Exhaust Duct, Part # 12120600003049.
- For a Comfort-Aire REG display-box assembly: choose the Display Box Subassy Box, Part # 17220300A17150.
- For Comfort-Aire PS or PSH models named with the round adaptor: the connector is the relevant match.
- For REG-123, REG-183, or REG-81 variants named for the display box: the display-box subassembly is the relevant match.
