Determining the exact BTU (British Thermal Units) rating of a specific air conditioner model can be a bit challenging without access to comprehensive manufacturer records. However, I can provide you with some general information about window air conditioner BTU ratings and factors that might influence the BTU capacity of your 1996 Kenmore model D-22 air conditioner. Window air conditioners are typically rated in terms of their cooling capacity, which is measured in BTUs. BTUs represent the amount of heat an air conditioner can remove from a room in an hour. The higher the BTU rating, the more powerful the cooling capacity of the air conditioner. In 1996, window air conditioners like the Kenmore model D-22 were available with a range of BTU ratings to accommodate different room sizes and cooling needs. However, it's important to note that the BTU rating is often not directly tied to the model number or serial number of the unit. Instead, it might be indicated on a label or plate located on the air conditioner itself. To find the specific BTU rating of your Kenmore D-22 air conditioner, you should locate the unit's data plate or label. This plate is usually located on the side, back, or bottom of the air conditioner. It provides important information such as the manufacturer, model number, serial number, and often the BTU rating. Given that the BTU rating might not be readily available in the information you've provided, I recommend checking the data plate on the air conditioner for the exact BTU rating. If you're unable to find this information on the unit itself, you might consider reaching out to Kenmore customer service or referring to any documentation that came with the air conditioner when it was purchased. In summary, the BTU rating of your 1996 Kenmore window air conditioner, model D-22, is likely to be indicated on a label or plate located on the unit itself. It's essential to refer to this specific information to determine the cooling capacity of your air conditioner accurately.