How old is my Allied Air unit?
Allied Air is part of Lennox International (Allied Air Enterprises). 4 serial formats sourced across central air conditioner, heat pump, furnace.
Serial number decoder for Allied Air
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: 5899L17212
- Allied Air air conditioner serial numbers in the 1973 to present format encode the year as digits 3-4 (YY) and the month as letter at position 5 (A=Jan .. M=Dec, I skipped) (source: building-center.org).
- Example: serial 5899L17212 decodes to November 1999.
- Allied Air air conditioner serial numbers in the era not stated format encode the year as digits 3-4 = YY (4601J19567 = 2001; 1606B13871 = 2006; 4607B20058 = 2007) and the month as letter 5 (A=Jan .. M=Dec, I not used) (source: building-center.org).
- Example: serial 4601J19567 decodes to September 2001.
- Allied Air air conditioner serial numbers in the era not stated format encode the year as digits 7-8 = YY (4140720328 = 2003; 0183290431 = 2004) and the week as digits 9-10 (28; 31 = end of August) (source: building-center.org).
- Example: serial 4140720328 decodes to week 28 of 2003.
Decoder pages by product
Format eras
- 1973 to present VERIFIED
####A#####Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - 1970 to 1977 VERIFIED
##A##AA###Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - era not stated VERIFIED
####A#####Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - era not stated VERIFIED
##########Central Air Conditioner, Heat Pump, Furnace, Packaged Unit
Official lookup: the authority
Open the official Lennox lookup takes serial (####A#####, A##A######, AA##A#####); returns Your Product's Coverage; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- Allied Air is treated as sharing Lennox's format because the source lists it in that family; the corporate relationship itself is an estimate.
- No official online lookup URL was verified for Allied Air.
Sources
- https://www.building-center.org/lennox/
- https://www.lennox.com/residential/owners/assistance/warranty/official
- https://www.building-center.org/concord-hvac-age/
- https://www.building-center.org/wp-content/uploads/2018/06/Concord-Style-2.png
- https://www.building-center.org/airease-hvac-age/
- https://www.building-center.org/ducane-hvac-age/
- https://www.building-center.org/armstrong-air-hvac-age/
- https://www.building-center.org/magic-pak-hvac-age/
- https://www.building-center.org/allied-commercial-hvac-age/
- https://www.building-center.org/aire-flo-hvac-age/
- https://www.building-center.org/wp-content/uploads/2023/12/Ducane-HVAC-style-1.jpg
- https://www.building-center.org/wp-content/uploads/2018/06/Concord-Style-1.png
- https://www.building-center.org/wp-content/uploads/2015/09/Style-3_Airease-Date-of-Manufacture_Serial-Number-Nomenclature1.png
