If the same 100,000 Btu furnace has an efficiency rating of 93% it will produce:įor 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. For example, if a furnace has a listed input rating of 100,000 Btu's and an efficiency rating of 80%, it will produce Then, to calculate the output on a gas furnace, multiply its efficiency rating by its listed input rating for the actual Btu output of heat. For example, if you live in the yellow zone, your home is well insulated, and you have 2000 heated square feet, the equation will look like this: Simply multiply the appropriate factor above by your home's total heated square footage to arrive at your approximate required heating capacity. (Hint: Use the larger of the two numbers above if you're unsure of your home's insulation) Use the lower of the two numbers if your home is well insulated and the higher number if it is older or poorly insulated. Heating Square Footage Range by Climate Zone ZONE 1 Sizing air conditioners by phone is difficult but we can provide you with the tools to get you started. If you're still unsure which system size is right for you, or if you're having difficulty downloading the Air Conditioner Size Calculator, please e-mail us or call us toll free number at 1-88.
Proper air conditioner sizing is critical to optimize performance. In addition, it will cycle on and off more frequently, increasing operating costs and reducing the system life. In other words, the compressor will not run long enough to dehumidify the space and will limit your comfort.
If the system you install is too large for the space, it will short cycle. When sizing air conditioners, be careful not to make the mistake of getting one that is too large. Use the following conversion information to determine your existing system size (use the system model number NOT the serial number) The number 24 in the model number indicates the unit is 24,000 Btu's, divided by 12,000 Btu's per ton, equals 2 tons.Ģ4,000 Btu's/12,000 Btu's per ton = 2 tons The system capacity will be coded into the model number of the outdoor unit.įor example, model CKL24-1 is a 2 ton unit. The manufacturers do not list the air conditioner size on the unit. In order to scientifically calculate the right central air conditioner size, you can perform a Residential Load Calculation.Īnother way to size air conditioners is to determine the system size that is currently in place. Water Source Heat Pumps Communicating Systems Split Systems Straight Cool Split Systems.Package Units Dual Fuel Mini Split Systems Single zone R-410A Heat Pumps Condensers Packaged Units Package Electric Heat Gas Heating Cooling & Heating Split system
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