Factory + year/week
E072514528
Week 25, 2007 (around June).
Furnaces & AC / Comfortmaker
How old is my Comfortmaker HVAC unit?
ComfortmakerChange
Ad space (kept empty until an ad network is approved)
Where to find the serial number
Look for “Serial” or “S/N” near the service connectionsComfortmaker serial formats we can read
Dark = year, orange = month or week.
Coverage and sources
Supports the factory-letter + nine-digits ICP layout. The annotated reference identifies a production week; some page text incorrectly calls it a month. Earlier recall and short serials are excluded.
References checked 2026-10-26.
- www.building-center.org/comfortmaker-hvac-age/
- www.building-center.org/wp-content/uploads/2017/08/HEIL-1.jpg
Independent reference tool, unaffiliated with Comfortmaker. Sources & method