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Style 1:

The Date of Manufacture is in the third through fifth digits of the serial number and represent the year and month of production:


5601D 08606

56 01 D 08606

01 Year



Style 2:

The Date of Manufacture is in the last three digits of the serial number and represents the month and year of production



C89284 B A C

B Month (February)

A Year (1980)


A January                   G July

B February                  H August

C March                      J  September

D April                         K October

E May                          L November

F June                         M December


A 1980

B 1981

C 1982

D 1983

E 1984

F 1985

G 1986

H 1987

J 1988

K 1989

L 1990

M 1991

N 1992


Style 3:

The Date of Manufacture is in the first five digits of the serial number and represents the day, month and year of production


15A67 JA018

15 A 67 JA018

15 Day


67 Year


Style 4:

The Date of Manufacture is in the last four digits of the serial number and represents the year and week of production


415072 03 28

03 Year

28 Week

Lennox is a well-respected brand in the HVAC industry, known for its high-quality, innovative, and energy-efficient air conditioning systems. Here are some key points about Lennox air conditioning:

1. **History and Reputation**:
   - Lennox has a long history dating back to 1895 and has established itself as a leader in the HVAC industry.
   - The brand is recognized for its commitment to innovation, quality craftsmanship, and customer satisfaction.

2. **Product Range**:
   - Lennox offers a comprehensive range of air conditioning systems, including central air conditioners, heat pumps, ductless mini-split systems, and packaged units.
   - Their products cater to both residential and commercial markets, providing solutions for various cooling needs and building sizes.

3. **Energy Efficiency**:
   - Lennox air conditioners are designed to be highly energy-efficient, with many models featuring high Seasonal Energy Efficiency Ratio (SEER) ratings.
   - Some of their top-tier models offer SEER ratings up to 26, which can significantly reduce energy consumption and utility costs.

4. **Features and Technology**:
   - Lennox incorporates advanced technology in their air conditioning systems, such as variable-speed and two-stage compressors, which provide enhanced comfort, precise temperature control, and improved energy efficiency.
   - Many Lennox units feature the iComfort® S30 smart thermostat, allowing for remote monitoring and control via smartphone apps, along with integration with smart home systems.
   - Their systems are designed for quiet operation, utilizing technologies like SilentComfort™, which reduces operating noise levels.

5. **Warranty**:
   - Lennox offers strong warranty programs, typically providing a 10-year limited warranty on parts for many of their air conditioning units.
   - Extended warranties and additional coverage options may be available through authorized dealers, providing added peace of mind.

6. **Manufacturing and Support**:
   - Lennox products are manufactured with a focus on quality, reliability, and durability, adhering to stringent manufacturing standards and quality control processes.
   - The brand has an extensive network of certified dealers and service technicians, ensuring professional installation, maintenance, and support services.

7. **Innovation and Sustainability**:
   - Lennox is committed to innovation and sustainability, continuously developing new technologies to improve energy efficiency and reduce environmental impact.
   - They emphasize the use of eco-friendly refrigerants and sustainable manufacturing practices.

8. **Global Reach and Recognition**:
   - Lennox is a globally recognized brand with a strong presence in various international markets, known for delivering superior HVAC solutions tailored to local climate conditions and customer needs.

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