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How to Decode Furnace Model Numbers

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Whether you need a York furnace model number or a Goodman furnace model number, it's a good idea to know where to find furnace model numbers and how to decode them. These numbers are essential when searching for replacement parts. You can find the model number on the furnace or even on the guarantee card and the original bill. Decoding the number takes a little more effort.

Understand Model Numbers

It's important to understand what model numbers are so you can appreciate the need to learn more about them. Every individual unit comes with its own model number. Most service and instruction manuals have only the partial model number, and that may not be enough to identify replacement parts. Without the complete model number, you can't get the exact part, which could prevent repairs on your unit.

Identifying the Model Numbers

Residential and commercial cooling systems consist of three parts: the condensing unit (the unit located outside the premises), the furnace and the evaporator (both located indoors). Each of these units has a separate model number. For example, to identify Carrier model AC numbers, look specifically at the furnace unit to get the number. Model numbers vary from company to company.

Carrier Model Description Numbers

Carrier model furnace numbers can be decoded in the following way: G is the product type and stands for gas furnace. U is the supply type and stands for upflow. I is the furnace type and means induced draft. D is the model's features and stands for air command 80 SV. Three digit number is the nominal output, e.g., 045 stands for 45,000 btu. C is the design series and stands for the Third Series. A is the additional features. Two digit number is the airflow capacity, e.g., 30 stands for three tons.

York HVAC Model Numbers

York HVAC model numbers are slightly different. In the example model number G48Q3/4-200-2, G48 is the series number, Q3/4 is the unit capacity, 200 is the BTU rating and 2 is the dash number.

Bryant Furnace Number Models

Bryant is another popular furnace model. The first three numbers are the series, the fourth letter is the model, the fifth letter is the electrical code, the sixth letter is the variation, the next three digits are the cooling capacity and the last three digits are the heating capacity. In short, decoding the furnace model is essential to getting the right replacement part. Model numbers vary from company to company and are important for product maintenance.