International Comfort Products LLC, of Lewisburg, Tenn. Makers of:

Airquest
Arcoaire
Comfortmaker
Heil
Keeprite (Canada)
Kenmore
ICP Commercial
Tempstar
Lincoln (oil furnaces - Canada)

S/N: L001241468 circa: March 2000

First 2 numbers are the year, second two numbers are the week.