Our apologies for the inconvenience. The Lennox Model number of your unit is the most important information required in determining the correct replacement part you need. Each individual unit has its own unique model number which is located on the data plate of the unit. 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). 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. 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).

Each of these components have their own unique model number. Model numbers have varied over the years but their general breakdown is consistent for the most part.  If you have any issues with finding your model number or determining what it means, don’t hesitate to contact the HVAC professionals here at HVAC Parts Shop.  ac unit small windowWe’ll be more than happy to help you get the information you need and make sure you get the perfect part for your system.how big central ac unit do i need has posted videos on YouTube to assist you in locating the model numbers:window ac unit turning on and off Our Air Conditioning Model Number location video can be found by clicking . Our Furnace Model Number location video can be found by clicking .