My Carrier rep assures me Carrier has nothing to do with Heil, it's
just that Carrier's parent owns both, and many other companies besides.
I just found the Better business report - it has Carrier listed as
"unsatisfactory":

http://search.buffalo.bbb.org/nis/ne...41000057100593

Heil is a brand of International Comfort Products, LLC. They have a
"satisfactory" report from the bbb:

http://data.middletennessee.bbb.org/...html?bid=10623

Then again, Carrier has a far bigger market share, so maybe it is going
to get more complaints just from the volume...

.... still none the wiser.