CHAT ONLINE NOW If your home is not well insulated, has older style windows, and/or a larger than average number of windows, you will want to select the larger system which falls within your square footage range. AC Unit Size Calculator accurately estimates the size of the central air conditioner unit you should install in your house. BTUs stand for British Thermal Units While this chart is used as a general rule of thumb for selecting air conditioner size, variations can occur depending A general rule of thumb is that if your home is well insulated with newer style windows, you can select the smaller size system that falls within your total square footage. These figures are based on a room with 8-foot ceilings, 2 windows and 1 door. This should be your first consideration when choosing an air conditioning unit because you will need an air conditioner that has the output capacity to cool the home it is intended for. Break up each room into as many squares and rectangles as you need to be able to measure the entire space This depends on the room's area, the average number of people regularly in the room, and the orientation of the room with respect to the sun. You should also look for a unit that has at least an 11.6 Seasonal … If the same 100,000 BTU furnace has an efficiency rating of 93% it will produce: For this example, using an 80% efficient furnace, the 2000 square foot home above would require a 100,000 BTU input furnace which will produce the necessary 80,000 BTU's output of heat. Once you know the area of your room, check the chart below for its corresponding recommended base air conditioner capacity: After knowing your base air conditioner capacity, you also have to measure how high your ceiling is, and apply any necessary adjustments. This calculator should only be used to estimate your building’s BTU needs. The turnaround for this service is 1-2 days. the air conditioner is big enough to cool the area you want it to. COVID-19 → Learn more about the precautionary measures we're taking to provide a safe and clean environment. While deciding to regulate the temperature and humidity of your house is the easy part, air conditioners come in a lot of different sizes, and choosing the wrong one could end up wasting you money or time, having to go back to the store for a replacement. As an alternative to the sizing chart below we offer MANUAL J - a professional load calculation based on your floor plan, location, and all variables. You should consult a professional before deciding exactly what sized airconditioner you need. an air conditioner that is too large for the space may mean you’re spending more money, both on BTUs stand for British Thermal Units and refer to the amount of energy your air conditioner is using per hour. Upon calculating your HVAC system size (tonnage), you will be shown a selection of systems that fit your recommended size. Another way to size air conditioners is to determine the system size that is currently in place. Getting the right-sized air conditioning unit is too important to leave to chance.