The first letter of the serial number denotes the year of manufacture for First Co. products, based on the listing below. The serial number may be noted on two lines, as below, or one line. So “I” indicates 2002 manufacture.

A = 1994     B = 1995     C = 1996     D = 1997     E = 1998

F = 1999.    G = 2000     H = 2001     I - 2002       J = 2003     

K = 2004     L = 2005     M = 2006     N = 2007    P = 2008     

R = 2009    S = 2010     T = 2011     U = 2012     V = 2013     

W = 2014   X = 2015     Y = 2016     Z = 2017     A = 2018    

B = 2019     C = 2020    D = 2021    E = 2022    

(And the sequence continues, with  F= 2023, G = 2024 etc.)

    First Co. manufactures a wide range of commercial and multi-famlily HVAC products, including fan coils, vertical package units, and through-the-wall units.

    For the age of another brand or manufacturer, go to our blog post How do I determine the age of my air conditioner?  

  To learn more about heating and air conditioning systems, see these other blog posts:

• How can I find out the SEER of my air conditioner? 

• My air conditioner won't turn on. What's wrong? 

• How can I find out the size of my air conditioner? 

• How can I find out the age of my air conditioner or furnace?

• How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump? 

• Where is the air filter for my central air conditioner and furnace? I can’t find it? 

• Does an old air conditioner use more electricity as it ages? 

• How did homes stay cool in Florida before air conditioning?

• What is wrong with an air conditioner when the air flow out of the vents is low?

• Why has the thermostat screen gone blank? 

• Why does it take so long to cool a house when an air conditioner has been off for a while? 

• Why is my air conditioner not cooling enough? 

• What are the most common problems with wall/window air conditioners?  

• Will closing doors reduce my heating and cooling costs? 

      Visit our HEATING AND AIR CONDITIONING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.