Goodman® HVAC age
How to determine the date of production/manufacture or age of Goodman® brand HVAC Systems.
The industry average service design life for most forced air furnaces is 15-20 years, and the industry average service design life for most air conditioning condensing units is 10-15 years. The average service design life of boilers can vary from as little as 10 years to as many as 50 years depending on the type and quality of materials used in their manufacture. Routine upkeep/maintenance, regional weather/climate, and location/placement of the mechanical systems will all play critical roles in the longevity of these systems.
See also: Estimated Useful Service Life Expectancies
Parent Company: Operating as independent subsidiary of Daikin Group
Subsidiaries or other related brands: Goodman (GmC), Amana, Janitrol, Daikin
Example serial number styles/formats found:
- Style 1: 9704011000
- Style 2: 5FU5472618P
Legend: Year is RED; Month is GREEN; Week is BLUE
Style 1: 9704811080
Year of manufacture can be determined by using the 1st & 2nd positions of the serial number
Month of manufacture can be determined by using the 3rd & 4th positions of the serial number

Style 2: 5FU5472618P
Year of manufacture can be determined by using the 3rd position (2nd letter) of the serial number
Month of manufacture can be determined by using the 2nd position (1st letter) of the serial number
Note: This style used on select Packaged Terminal Air Conditioners (PTAC systems) manufactured for Goodman under the Goodman brand name by Daikin Industries. All units will have the Letter "P" or "D" at the end of the serial number. This style ended shortly after 2012 acquisition of Goodman by Daikin.

Goodman® History¹
- 1954 - Harold V. Goodman forms air conditioning contractor business in Houston, Texas. Becomes one of the most successful HVAC contractors by late 1960's.
- 1975 - Company entered HVAC manufacturing with formation of Goodman Manufacturing, L.P. - started as manufacturer of flexible air ducts and plastic blade registers.
- 1982 - Acquired Janitrol and began manufacturing central air conditioning systems.
- 1986 - Expanded product offerings to include gas heating products.
- 1997 - Acquires Raytheon Appliances (predecessor of Amana Corporation).
- 2001 - Goodman separates the appliance and HVAC divisions.
- 2002 - Goodman sold the appliance division to Maytag (now Whirlpool), but retained the furnace and air conditioner division including Amana branded HVAC systems.
- 2004 - Goodman acquired by Apollo Managment, a private equity firm.
- 2007 - Goodman acquired by Hellman & Friedman, a private equity firm.
- 2012 - Daikin acquires Goodman Manufacturing.
- 2016 - Daikin completes 4.2 million square foot, state-of-the-art facility and consolidates Goodman's HVAC manufacturing, logistics, and customer support under one roof - Daikin Texas Technology Park campus, Houston, Texas.
¹Excerpts from https://www.goodmanmfg.com/about/history