Any help would be greatly appreciated as to the age/ year of manufacture of this FHA unit. Data plate names Heil, cabinet names Whirlpool. Also, is there a definitive guide out there that lists manufacturers and ages?
Model NUGI1150AK01
Serial H521 73921
Keith,
it’s either an 84 or 85
BTW be carefull of those NUGI models I’ve heard they get painfull 
Regards
Gerry
Curtosy of Greg Bell from another thread. Make a copy of this and you will never have to ask for ages again.
Thank you Doug Edwards & Greg Bell (Video clip was fantastic Greg) I’ve always appreciated your humor Gerry!
May 1985.