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13ACX Air Conditioner

Merit® Series

13ACX Air Conditioner

Economical, environmentally responsible home cooling

Even in the hottest summer months, the 13ACX works efficiently to enhance your comfort. Compared to an older system, this air conditioner can help you save significantly on your monthly cooling bills.


Here are some of the top features of the 13ACX:

Efficiency rating meets or exceeds 13.00 SEER

Dependable scroll compressor provides smooth, efficient and reliable operation.


Features and Benefits

Energy Efficiency

  • Efficiency rating meets or exceeds 13.00 SEER—which can save you hundreds of dollars a year, compared to a standard air conditioner
  • High-efficiency outdoor coil—provides exceptional heat transfer and low air resistance for high-efficiency operation

Quiet Operation

  • Sound levels—as low as 76 dB
  • Direct-drive fan—precision-balanced direct-drive outdoor fan is designed to provide quieter operation and longer product life

Home Comfort

  • Dependable scroll compressor—provides smooth, efficient and reliable operation
  • Designed to work with the Humiditrol® whole-home dehumidification system*

Environmental Responsibility

  • Chlorine-free R-410A refrigerant—meets the EPA's most stringent environmental guidelines

Reliable Performance

  • PermaGuard™ Cabinet—heavy-gauge, galvanized steel construction, louver coil guard, baked-on powder finish and durable zinc-coated steel base provide long-lasting protection against rust and corrosion.

Warranty and Specs

Warranty and Specs

13ACX Product Literature

Product Brochures


13ACX Air Conditioner Product Brochure

Installation Manuals


13ACX Air Conditioner Installation Manual


Rated 4.6 out of 5 by 142 reviewers.
Rated 5 out of 5 by COLD and Quiet What can I say Lennox ROCKS. Super quiet, unit by bedroom window and do not hear it. September 25, 2014
Rated 5 out of 5 by Efficient and cost effective The unit is efficient and quiet. It seems to be a quality machine. It is an upgrade over my previous unit (higher efficiency) but it still fit on my slab, same foot print only taller, this made the installation easier. September 23, 2014
Rated 5 out of 5 by quiet & efficient Lennox Sales representative suggested these units as quiet & efficient. ..I agree. ..my neighbors are happy too! September 23, 2014
Rated 5 out of 5 by Quiet and Efficient I have noticed a tremendous difference in our new system compared to our old system. It works great and is very quiet. I am looking forward to seeing our electric bill go down! September 23, 2014
Rated 4 out of 5 by Does what it says on the tin installation went smoothly, no problems with the product September 23, 2014
Rated 4 out of 5 by Condensing unit Relatively quiet, reasonable cost and seems to do just as advertised. I had them all and now Lennox brand, so far so good... September 18, 2014
Rated 5 out of 5 by Quiet and good job cooling the house This unit is located just outside my bedroom window. I am a light sleeper and I have not heard the unit turn on or off. The unit cools the upstairs of the house and so far we are pleased with the temperature control. September 18, 2014
Rated 5 out of 5 by This product is economical and works great! The 13 ACX 2.5 ton 13 SEER is a great value and just right for my 1500 sq ft house. It's very economical, and a tremendous improvement over my 14 year old system. I wasn't looking for a system with all the bells and whistles, just looking for a realiable system to keep the house cool without the hassle. This system does the trick. September 18, 2014

*Must be accompanied by either a variable speed air handler or furnace and the ComfortSense® 7000 Series touchscreen thermostat

Recognitions and Certifications

UL Listed (C)(US) AHRI Certified C Good Housekeeping HRAI Canada

© 2014 Lennox International Inc.