Lennox 12ACB Air Conditioner Specifications

Misty Faucheux

Lennox sells its products worldwide, including the Lennox 12ACB series of air conditioning units. This series was first released in 1997, and it's for residential users. You can purchase Lennox products from authorized dealers throughout the nation. Lennox International Inc.

, headquartered in Richardson, Texas, started in 1895, and it produces heating, air conditioning, ventilation and refrigeration products.


Six different models are part of the 12ACB series, including the following: 12ACB24, 12ACB30, 12ACB42, 12ACB36, 12ACB60 and 12ACB48. All the models, except the 12ACB48 and the 12ACB60, have the same dimensions, which are 33.25 inches long by 25.25 inches wide. The other two units are 37.25 inches long by 28.25 inches wide. The unit has four feet, which are 2 inches high. The liquid line diameter is 0.375 inches, and the suction line is a maximum of 0.9 inches in diameter. You need 36 inches of clearance on all sides of the unit. The units weigh between 155 and 180 lbs.


The circuit amp capacity of the Lennox 12ACB units is between 14 and 28 amps, and these units use a breaker or fuse up to 60 amps. All of these units are one-phase units and use between 208 and 230 volts. The compressor uses rated load amps of between 10.3 and 28.9 amps, and the condenser coil fan motor uses full load amps between 1.1 and 1.9 amps. The full load amps is the total amount of amps that fan should use while in operation, and the rated load amps is maximum amount of amps the compressor should draw while operating.

Condenser Coil

The condenser outer coil for all models is 15.21 square feet, and the inner coil is 15.11 square feet for all models except the 12ACB24. The inner coil for this model is 5.11 square feet, and the tube diameter of all models is 0.31 inches. The condenser fan produces up to 1/6 horsepower and blows air at speeds up to 2,500 cubic feet per minute. The diameter of the fan is 18 inches for all models. It produces up to 200 watts of power and spins at speeds up to 1,100 rpm.


The Lennox 12ACB series models have compressors and fans that use split capacitor motors, which means that both units use the same dual capacitor, which saves space. It also comes with a timed off control feature, which allows the compressor to re-energize between cycles. All of the controls are located inside your home for easier access.