![]() This particular unit can be matched with a 3 to 4 ton condensing unit. The capability of air movement of this example furnace is 1200 to 1600 cubic feet per minute of air. There are 400 CFM (Cubic Feet Per Minute) of airflow per ton of cooling. Here the 3/4 indicates a 3 to 4 ton drive. This is the drive or air capacity of the unit. This is the series number the G meaning gas (Natural or LP). Each of these components have their own unique model number.ĭifferent parts of the model number mean different things. In a residential heating and cooling system there are generally three main components which make up the heating and cooling system: the condensing unit (outside unit), the furnace, and the evaporator coil (both are indoor and generally mounted together). ![]() It is essential that you get the complete model number from you HVAC unit when looking for a replacement part to ensure that you get the exact part that you need to make sure that your system is running smoothly and efficiently throughout the year. Instruction manuals and service manuals which may have come with your unit do not contain the complete model number required to identify replacement parts (except when the installer actually wrote down the complete model number in them). The Lennox Model number of your unit is the most important information required in determining the correct replacement part you need.Įach individual unit has its own unique model number which is located on the data plate of the unit.
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